chore: regens API reference docs (#889)

diff --git a/docs/dyn/gamesConfiguration_v1configuration.imageConfigurations.html b/docs/dyn/gamesConfiguration_v1configuration.imageConfigurations.html
index 5b99373..1ff2c6c 100644
--- a/docs/dyn/gamesConfiguration_v1configuration.imageConfigurations.html
+++ b/docs/dyn/gamesConfiguration_v1configuration.imageConfigurations.html
@@ -75,29 +75,31 @@
 <h1><a href="gamesConfiguration_v1configuration.html">Google Play Game Services Publishing API</a> . <a href="gamesConfiguration_v1configuration.imageConfigurations.html">imageConfigurations</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#upload">upload(resourceId, imageType, media_body=None, media_mime_type=None)</a></code></p>
+  <code><a href="#upload">upload(resourceId, imageType, media_body=None, media_mime_type=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Uploads an image for a resource with the given ID and image type.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="upload">upload(resourceId, imageType, media_body=None, media_mime_type=None)</code>
+    <code class="details" id="upload">upload(resourceId, imageType, media_body=None, media_mime_type=None, x__xgafv=None)</code>
   <pre>Uploads an image for a resource with the given ID and image type.
 
 Args:
   resourceId: string, The ID of the resource used by this method. (required)
   imageType: string, Selects which image in a resource for this method. (required)
-    Allowed values
-      ACHIEVEMENT_ICON - The icon image for an achievement resource.
-      LEADERBOARD_ICON - The icon image for a leaderboard resource.
   media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
   media_mime_type: string, The MIME type of the media request body, or an instance of a MediaUpload object.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
-    { # This is a JSON template for an image configuration resource.
+    { # An image configuration resource.
     "url": "A String", # The url for this image.
     "resourceId": "A String", # The resource ID of resource which the image belongs to.
-    "kind": "gamesConfiguration#imageConfiguration", # Uniquely identifies the type of this resource. Value is always the fixed string gamesConfiguration#imageConfiguration.
+    "kind": "A String", # Uniquely identifies the type of this resource. Value is always the fixed
+        # string `gamesConfiguration#imageConfiguration`.
     "imageType": "A String", # The image type for the image.
   }</pre>
 </div>