chore: Update discovery artifacts (#1486)

## Deleted keys were detected in the following stable discovery artifacts:
displayvideo v1 https://github.com/googleapis/google-api-python-client/commit/21f81c824089d0060dbd624f9755eea554464af2
sts v1 https://github.com/googleapis/google-api-python-client/commit/a8ebc2bef5d0ff6c449d65fcc9c0554c1f388985

## Deleted keys were detected in the following pre-stable discovery artifacts:
networkconnectivity v1alpha1 https://github.com/googleapis/google-api-python-client/commit/68588ad4744aa3c7a3a0afa12a1566f54ab3be94

## Discovery Artifact Change Summary:
feat(apigee): update the api https://github.com/googleapis/google-api-python-client/commit/41ae79b3554ffc9f1622e44757751009eeed76f8
feat(bigqueryreservation): update the api https://github.com/googleapis/google-api-python-client/commit/b0483aba20b17580b400283fb0073f07715bf254
feat(chat): update the api https://github.com/googleapis/google-api-python-client/commit/270312294f1cf89041825b0f31bfcf872fda9854
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/30c122278e75a99b5b2a6ed330f317015134a23d
feat(cloudscheduler): update the api https://github.com/googleapis/google-api-python-client/commit/0405b1db79fe87305be25ba4f9389e94490040a7
feat(contactcenterinsights): update the api https://github.com/googleapis/google-api-python-client/commit/3abcf5334053f5612fd79163f2c433e5793ee782
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/c4935840495b1487d4be47b63f6c416113b9413f
feat(displayvideo): update the api https://github.com/googleapis/google-api-python-client/commit/21f81c824089d0060dbd624f9755eea554464af2
feat(monitoring): update the api https://github.com/googleapis/google-api-python-client/commit/d997b2c0d13203ac29b55c19858ef375380a5b7b
feat(networkconnectivity): update the api https://github.com/googleapis/google-api-python-client/commit/68588ad4744aa3c7a3a0afa12a1566f54ab3be94
feat(notebooks): update the api https://github.com/googleapis/google-api-python-client/commit/b975c34568f62bbf19f67f4731fe091aeeda8a75
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/c2bcb7081a4f656b9e136ea38637cf262b60f387
feat(servicenetworking): update the api https://github.com/googleapis/google-api-python-client/commit/3bdc7b9d0854918ef65ccb4a3798d2f3f3b19d70
feat(sts): update the api https://github.com/googleapis/google-api-python-client/commit/a8ebc2bef5d0ff6c449d65fcc9c0554c1f388985
diff --git a/docs/dyn/chat_v1.spaces.messages.html b/docs/dyn/chat_v1.spaces.messages.html
index b21bf86..8612be1 100644
--- a/docs/dyn/chat_v1.spaces.messages.html
+++ b/docs/dyn/chat_v1.spaces.messages.html
@@ -848,6 +848,7 @@
   ],
   "createTime": "A String", # Output only. The time at which the message was created in Hangouts Chat server.
   "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards cannot be displayed (e.g. mobile notifications).
+  "lastUpdateTime": "A String", # Output only. The time at which the message was last updated in Hangouts Chat server. If the message was never updated, this field will be same as create_time.
   "name": "A String",
   "previewText": "A String", # Text for generating preview chips. This text will not be displayed to the user, but any links to images, web pages, videos, etc. included here will generate preview chips.
   "sender": { # A user in Google Chat. # The user who created the message.
@@ -1621,6 +1622,7 @@
   ],
   "createTime": "A String", # Output only. The time at which the message was created in Hangouts Chat server.
   "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards cannot be displayed (e.g. mobile notifications).
+  "lastUpdateTime": "A String", # Output only. The time at which the message was last updated in Hangouts Chat server. If the message was never updated, this field will be same as create_time.
   "name": "A String",
   "previewText": "A String", # Text for generating preview chips. This text will not be displayed to the user, but any links to images, web pages, videos, etc. included here will generate preview chips.
   "sender": { # A user in Google Chat. # The user who created the message.
@@ -2418,6 +2420,7 @@
   ],
   "createTime": "A String", # Output only. The time at which the message was created in Hangouts Chat server.
   "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards cannot be displayed (e.g. mobile notifications).
+  "lastUpdateTime": "A String", # Output only. The time at which the message was last updated in Hangouts Chat server. If the message was never updated, this field will be same as create_time.
   "name": "A String",
   "previewText": "A String", # Text for generating preview chips. This text will not be displayed to the user, but any links to images, web pages, videos, etc. included here will generate preview chips.
   "sender": { # A user in Google Chat. # The user who created the message.
@@ -3192,6 +3195,7 @@
   ],
   "createTime": "A String", # Output only. The time at which the message was created in Hangouts Chat server.
   "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards cannot be displayed (e.g. mobile notifications).
+  "lastUpdateTime": "A String", # Output only. The time at which the message was last updated in Hangouts Chat server. If the message was never updated, this field will be same as create_time.
   "name": "A String",
   "previewText": "A String", # Text for generating preview chips. This text will not be displayed to the user, but any links to images, web pages, videos, etc. included here will generate preview chips.
   "sender": { # A user in Google Chat. # The user who created the message.
@@ -3965,6 +3969,7 @@
   ],
   "createTime": "A String", # Output only. The time at which the message was created in Hangouts Chat server.
   "fallbackText": "A String", # A plain-text description of the message's cards, used when the actual cards cannot be displayed (e.g. mobile notifications).
+  "lastUpdateTime": "A String", # Output only. The time at which the message was last updated in Hangouts Chat server. If the message was never updated, this field will be same as create_time.
   "name": "A String",
   "previewText": "A String", # Text for generating preview chips. This text will not be displayed to the user, but any links to images, web pages, videos, etc. included here will generate preview chips.
   "sender": { # A user in Google Chat. # The user who created the message.