chore: regens API reference docs (#889)

diff --git a/docs/dyn/androidpublisher_v3.edits.expansionfiles.html b/docs/dyn/androidpublisher_v3.edits.expansionfiles.html
index 3b5adfc..5e24492 100644
--- a/docs/dyn/androidpublisher_v3.edits.expansionfiles.html
+++ b/docs/dyn/androidpublisher_v3.edits.expansionfiles.html
@@ -78,10 +78,10 @@
   <code><a href="#get">get(packageName, editId, apkVersionCode, expansionFileType)</a></code></p>
 <p class="firstline">Fetches the Expansion File configuration for the APK specified.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(packageName, editId, apkVersionCode, expansionFileType, body)</a></code></p>
+  <code><a href="#patch">patch(packageName, editId, apkVersionCode, expansionFileType, body=None)</a></code></p>
 <p class="firstline">Updates the APK's Expansion File configuration to reference another APK's Expansion Files. To add a new Expansion File use the Upload method. This method supports patch semantics.</p>
 <p class="toc_element">
-  <code><a href="#update">update(packageName, editId, apkVersionCode, expansionFileType, body)</a></code></p>
+  <code><a href="#update">update(packageName, editId, apkVersionCode, expansionFileType, body=None)</a></code></p>
 <p class="firstline">Updates the APK's Expansion File configuration to reference another APK's Expansion Files. To add a new Expansion File use the Upload method.</p>
 <p class="toc_element">
   <code><a href="#upload">upload(packageName, editId, apkVersionCode, expansionFileType, media_body=None, media_mime_type=None)</a></code></p>
@@ -110,7 +110,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(packageName, editId, apkVersionCode, expansionFileType, body)</code>
+    <code class="details" id="patch">patch(packageName, editId, apkVersionCode, expansionFileType, body=None)</code>
   <pre>Updates the APK's Expansion File configuration to reference another APK's Expansion Files. To add a new Expansion File use the Upload method. This method supports patch semantics.
 
 Args:
@@ -121,7 +121,7 @@
     Allowed values
       main - 
       patch - 
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
@@ -140,7 +140,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(packageName, editId, apkVersionCode, expansionFileType, body)</code>
+    <code class="details" id="update">update(packageName, editId, apkVersionCode, expansionFileType, body=None)</code>
   <pre>Updates the APK's Expansion File configuration to reference another APK's Expansion Files. To add a new Expansion File use the Upload method.
 
 Args:
@@ -151,7 +151,7 @@
     Allowed values
       main - 
       patch - 
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {