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

diff --git a/docs/dyn/deploymentmanager_v2beta.html b/docs/dyn/deploymentmanager_v2beta.html
index 80a6718..b9cb7e0 100644
--- a/docs/dyn/deploymentmanager_v2beta.html
+++ b/docs/dyn/deploymentmanager_v2beta.html
@@ -72,7 +72,7 @@
 
 </style>
 
-<h1><a href="deploymentmanager_v2beta.html">Google Cloud Deployment Manager API V2Beta Methods</a></h1>
+<h1><a href="deploymentmanager_v2beta.html">Cloud Deployment Manager V2 API</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="deploymentmanager_v2beta.compositeTypes.html">compositeTypes()</a></code>