chore: regens API reference docs (#889)

diff --git a/docs/dyn/firebasehosting_v1beta1.sites.domains.html b/docs/dyn/firebasehosting_v1beta1.sites.domains.html
index b96110c..8d8c054 100644
--- a/docs/dyn/firebasehosting_v1beta1.sites.domains.html
+++ b/docs/dyn/firebasehosting_v1beta1.sites.domains.html
@@ -75,7 +75,7 @@
 <h1><a href="firebasehosting_v1beta1.html">Firebase Hosting API</a> . <a href="firebasehosting_v1beta1.sites.html">sites</a> . <a href="firebasehosting_v1beta1.sites.domains.html">domains</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a domain mapping on the specified site.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
@@ -84,23 +84,23 @@
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets a domain mapping on the specified site.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists the domains for the specified site.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#update">update(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#update">update(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates the specified domain mapping, creating the mapping as if it does</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent, body=None, x__xgafv=None)</code>
   <pre>Creates a domain mapping on the specified site.
 
 Args:
   parent: string, Required. The parent to create the domain association for, in the format:
-<code>sites/<var>site-name</var></code> (required)
-  body: object, The request body. (required)
+&lt;code&gt;sites/&lt;var&gt;site-name&lt;/var&gt;&lt;/code&gt; (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # The intended behavior and status information of a domain.
@@ -277,23 +277,23 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</code>
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Lists the domains for the specified site.
 
 Args:
   parent: string, Required. The parent for which to list domains, in the format:
-<code>sites/<var>site-name</var></code> (required)
+&lt;code&gt;sites/&lt;var&gt;site-name&lt;/var&gt;&lt;/code&gt; (required)
+  pageSize: integer, The page size to return. Defaults to 50.
   pageToken: string, The next_page_token from a previous request, if provided.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
       2 - v2 error format
-  pageSize: integer, The page size to return. Defaults to 50.
 
 Returns:
   An object of the form:
 
-    {
+    { # The response to listing Domains.
     "nextPageToken": "A String", # The pagination token, if more results exist.
     "domains": [ # The list of domains, if any exist.
       { # The intended behavior and status information of a domain.
@@ -355,14 +355,14 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(name, body, x__xgafv=None)</code>
+    <code class="details" id="update">update(name, body=None, x__xgafv=None)</code>
   <pre>Updates the specified domain mapping, creating the mapping as if it does
 not exist.
 
 Args:
   name: string, Required. The name of the domain association to update or create, if an
 association doesn't already exist. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # The intended behavior and status information of a domain.