chore: regens API reference docs (#889)

diff --git a/docs/dyn/youtubeAnalytics_v2.groups.html b/docs/dyn/youtubeAnalytics_v2.groups.html
index dba2862..1635504 100644
--- a/docs/dyn/youtubeAnalytics_v2.groups.html
+++ b/docs/dyn/youtubeAnalytics_v2.groups.html
@@ -78,7 +78,7 @@
   <code><a href="#delete">delete(onBehalfOfContentOwner=None, id=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Deletes a group.</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(body, onBehalfOfContentOwner=None, x__xgafv=None)</a></code></p>
+  <code><a href="#insert">insert(body=None, onBehalfOfContentOwner=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a group.</p>
 <p class="toc_element">
   <code><a href="#list">list(onBehalfOfContentOwner=None, mine=None, id=None, pageToken=None, x__xgafv=None)</a></code></p>
@@ -87,7 +87,7 @@
   <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(body, onBehalfOfContentOwner=None, x__xgafv=None)</a></code></p>
+  <code><a href="#update">update(body=None, onBehalfOfContentOwner=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Modifies a group. For example, you could change a group's title.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -168,11 +168,11 @@
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(body, onBehalfOfContentOwner=None, x__xgafv=None)</code>
+    <code class="details" id="insert">insert(body=None, onBehalfOfContentOwner=None, x__xgafv=None)</code>
   <pre>Creates a group.
 
 Args:
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # A group.
@@ -517,11 +517,11 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(body, onBehalfOfContentOwner=None, x__xgafv=None)</code>
+    <code class="details" id="update">update(body=None, onBehalfOfContentOwner=None, x__xgafv=None)</code>
   <pre>Modifies a group. For example, you could change a group's title.
 
 Args:
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # A group.