build: run docs regen in synth.py (#1059)

diff --git a/docs/dyn/iamcredentials_v1.projects.serviceAccounts.html b/docs/dyn/iamcredentials_v1.projects.serviceAccounts.html
index 75ae280..42cd977 100644
--- a/docs/dyn/iamcredentials_v1.projects.serviceAccounts.html
+++ b/docs/dyn/iamcredentials_v1.projects.serviceAccounts.html
@@ -105,13 +105,13 @@
     The object takes the form of:
 
 {
-    "scope": [ # Required. Code to identify the scopes to be included in the OAuth 2.0 access token. See https://developers.google.com/identity/protocols/googlescopes for more information. At least one value required.
-      "A String",
-    ],
     "delegates": [ # The sequence of service accounts in a delegation chain. Each service account must be granted the `roles/iam.serviceAccountTokenCreator` role on its next service account in the chain. The last service account in the chain must be granted the `roles/iam.serviceAccountTokenCreator` role on the service account that is specified in the `name` field of the request. The delegates must have the following format: `projects/-/serviceAccounts/{ACCOUNT_EMAIL_OR_UNIQUEID}`. The `-` wildcard character is required; replacing it with a project ID is invalid.
       "A String",
     ],
     "lifetime": "A String", # The desired lifetime duration of the access token in seconds. By default, the maximum allowed value is 1 hour. To set a lifetime of up to 12 hours, you can add the service account as an allowed value in an Organization Policy that enforces the `constraints/iam.allowServiceAccountCredentialLifetimeExtension` constraint. See detailed instructions at https://cloud.google.com/iam/help/credentials/lifetime If a value is not specified, the token's lifetime will be set to a default value of 1 hour.
+    "scope": [ # Required. Code to identify the scopes to be included in the OAuth 2.0 access token. See https://developers.google.com/identity/protocols/googlescopes for more information. At least one value required.
+      "A String",
+    ],
   }
 
   x__xgafv: string, V1 error format.
@@ -123,8 +123,8 @@
   An object of the form:
 
     {
-    "expireTime": "A String", # Token expiration time. The expiration time is always set.
     "accessToken": "A String", # The OAuth 2.0 access token.
+    "expireTime": "A String", # Token expiration time. The expiration time is always set.
   }</pre>
 </div>
 
@@ -168,10 +168,10 @@
     The object takes the form of:
 
 {
+    &quot;payload&quot;: &quot;A String&quot;, # Required. The bytes to sign.
     &quot;delegates&quot;: [ # The sequence of service accounts in a delegation chain. Each service account must be granted the `roles/iam.serviceAccountTokenCreator` role on its next service account in the chain. The last service account in the chain must be granted the `roles/iam.serviceAccountTokenCreator` role on the service account that is specified in the `name` field of the request. The delegates must have the following format: `projects/-/serviceAccounts/{ACCOUNT_EMAIL_OR_UNIQUEID}`. The `-` wildcard character is required; replacing it with a project ID is invalid.
       &quot;A String&quot;,
     ],
-    &quot;payload&quot;: &quot;A String&quot;, # Required. The bytes to sign.
   }
 
   x__xgafv: string, V1 error format.