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

diff --git a/docs/dyn/gmailpostmastertools_v1beta1.domains.html b/docs/dyn/gmailpostmastertools_v1beta1.domains.html
index 1d6b2dd..5ba36a0 100644
--- a/docs/dyn/gmailpostmastertools_v1beta1.domains.html
+++ b/docs/dyn/gmailpostmastertools_v1beta1.domains.html
@@ -134,6 +134,7 @@
   An object of the form:
 
     { # Response message for ListDomains.
+    "nextPageToken": "A String", # Token to retrieve the next page of results, or empty if there are no more results in the list.
     "domains": [ # The list of domains.
       { # A registered domain resource in the Postmaster API.
         "createTime": "A String", # Timestamp when the user registered this domain. Assigned by the server.
@@ -141,7 +142,6 @@
         "name": "A String", # The resource name of the Domain. Domain names have the form `domains/{domain_name}`, where domain_name is the fully qualified domain name (i.e., mymail.mydomain.com).
       },
     ],
-    "nextPageToken": "A String", # Token to retrieve the next page of results, or empty if there are no more results in the list.
   }</pre>
 </div>