chore: Update discovery artifacts (#1208)

## Discovery Artifact Change Summary:
admindirectory_v1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/3fc3b7614d5df2917e6285a1d4834cbcffd7c665)
adminreports_v1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/3fc3b7614d5df2917e6285a1d4834cbcffd7c665)
admobv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a2400d9c226a479be6532e1e2822efecc72b87c5)
admobv1beta[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a2400d9c226a479be6532e1e2822efecc72b87c5)
analyticsv3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/61136a15f60ec8deedca3f31a575865c3a28e49b)
analyticsreportingv4[ [More details]](https://github.com/googleapis/google-api-python-client/commit/03ee301449791d11cb7653d9a6431418304e5fbe)
androidenterprisev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/09a9ddc212d0062fcac494136a4fc21015cfa527)
assuredworkloadsv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a7b9f4cadc1168ec764f0839027d17a9a474a9ed)
bigquerydatatransferv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/52de288372258c6c926f646e8b77ced31245f705)
classroomv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/ec6203468fc483eec6a65c9464443f2d1a0b79c0)
cloudassetv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
cloudassetv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
cloudassetv1p1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
cloudassetv1p4beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
cloudassetv1p5beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
cloudassetv1p7beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/0e739c196ee75a225348798e2eb29b1ba599841a)
clouderrorreportingv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/aee2d1da567892798889b6231852bfb48a749de1)
cloudiotv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/c1635fdcd108c85ca6be0901ecb9f7f7468b7e3d)
cloudsearchv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/3ee9ab15d37a6c933d8b48eda9fec8125309040a)
cloudshellv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/e10759569feb88aa1a02472719a21f7beaa8a349)
containerv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/47958636b0fa68d9c23bacd765b90954293c7551)
datalabelingv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/ad487d5fd8455823ed044dd6567d1e1a85729755)
dfareportingv3.3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/fc38ed0d8aabe80a003866059d59f03b67c9de9f)
dfareportingv3.4[ [More details]](https://github.com/googleapis/google-api-python-client/commit/fc38ed0d8aabe80a003866059d59f03b67c9de9f)
docsv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/c6dcde43ee5c4bf53fcbbdbc52a88b73b9c45e2d)
domainsv1alpha2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/92b5958ee1e954019be6582e7ce80703ff91f17d)
domainsv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/92b5958ee1e954019be6582e7ce80703ff91f17d)
doubleclickbidmanagerv1.1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/2cf24fd0a733a07b55ad481165e9635b4e7bf9a3)
drivev2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a060399fea6a34ed6982db0186345eac27eedadd)
drivev3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a060399fea6a34ed6982db0186345eac27eedadd)
fcmv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/348a8bc10b44abe8e994b1619bee5e2333074411)
firebasehostingv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/15eb02bb44876ab6873539c206c064bd08e6684c)
fitnessv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/b40a9bb9c0f0c18c4839f58ecbe5f85c84053259)
gmailv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/6a77c586893584132d964293e1be34356d5fbfcb)
groupssettingsv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/bbbcfde0767f9dff176b9dce7432b4d7f2bc739e)
homegraphv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a867202c70cd9e7ee711ae13e43b8c5ce3f4cdbf)
indexnan[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a867202c70cd9e7ee711ae13e43b8c5ce3f4cdbf)
loggingv2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/8fcbde03c7790ced3dbcba11e05bea7a8f451ac4)
peoplev1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/6e4c87a393b295e72ec11a5b1e752e2c139685df)
recommendationenginev1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/e6ace9e4dfbe429016788fd3a4a32de8f359a2d1)
recommenderv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/c340d3f0d43cb250159fda91a0f884c06aa19346)
recommenderv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/c340d3f0d43cb250159fda91a0f884c06aa19346)
redisv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/f0d31fe127c3bcac9285457ff6510a6d9b4d7025)
redisv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/f0d31fe127c3bcac9285457ff6510a6d9b4d7025)
scriptv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/d235c949a32d1ce099cc6f1f161dc4930949bd80)
servicedirectoryv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/b8e06d2e15229e868b698cb4a296f3202f84bf24)
servicemanagementv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/eb37d585a103ca332e3af48a0f46c1408e805863)
smartdevicemanagementv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/67bfa0e50eb1a761222f3d424e662043b0a29171)
streetviewpublishv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/5825e78ab4c5b3a0bbfc85fa332e4962096fdb55)
tasksv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/dcd228af6573a3163da3cfaca9c0cb6cd679d282)
texttospeechv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/43220b5cd401440812e76821e6cbd5c3099659cd)
texttospeechv1beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/43220b5cd401440812e76821e6cbd5c3099659cd)
trafficdirectorv2[ [More details]](https://github.com/googleapis/google-api-python-client/commit/4141254d0c9f8627a35a5be19f23f673fc619164)
translatev3[ [More details]](https://github.com/googleapis/google-api-python-client/commit/b0bec6c2662ed00b6e80c5fd361fadf396f4e00c)
translatev3beta1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/b0bec6c2662ed00b6e80c5fd361fadf396f4e00c)
vaultv1[ [More details]](https://github.com/googleapis/google-api-python-client/commit/f946ac2b3cfa3f8566ceea85110b919a7d974352)
workflowsv1beta[ [More details]](https://github.com/googleapis/google-api-python-client/commit/a4ff4fcf07923786768354ab7f5cdef28ba3e29f)
diff --git a/docs/dyn/gmail_v1.users.settings.sendAs.html b/docs/dyn/gmail_v1.users.settings.sendAs.html
index 662cac2..9deaea2 100644
--- a/docs/dyn/gmail_v1.users.settings.sendAs.html
+++ b/docs/dyn/gmail_v1.users.settings.sendAs.html
@@ -124,7 +124,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -150,7 +150,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -198,7 +198,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -233,7 +233,7 @@
       "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
       "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
       "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-      "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+      "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
       "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
         "host": "A String", # The hostname of the SMTP service. Required.
         "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -264,7 +264,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -290,7 +290,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -319,7 +319,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.
@@ -345,7 +345,7 @@
   "isPrimary": True or False, # Whether this address is the primary address used to login to the account. Every Gmail account has exactly one primary address, and it cannot be deleted from the collection of send-as aliases. This field is read-only.
   "replyToAddress": "A String", # An optional email address that is included in a "Reply-To:" header for mail sent using this alias. If this is empty, Gmail will not generate a "Reply-To:" header.
   "sendAsEmail": "A String", # The email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.
-  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI.
+  "signature": "A String", # An optional HTML signature that is included in messages composed with this alias in the Gmail web UI. This signature is added to new emails only.
   "smtpMsa": { # Configuration for communication with an SMTP service. # An optional SMTP service that will be used as an outbound relay for mail sent using this alias. If this is empty, outbound mail will be sent directly from Gmail's servers to the destination SMTP service. This setting only applies to custom "from" aliases.
     "host": "A String", # The hostname of the SMTP service. Required.
     "password": "A String", # The password that will be used for authentication with the SMTP service. This is a write-only field that can be specified in requests to create or update SendAs settings; it is never populated in responses.