chore: update docs/dyn/index.md

Author: yoshi-automation

docs/dyn/index.md

@@ -919,6 +919,7 @@
 * [v1](http://googleapis.github.io/google-api-python-client/docs/dyn/osconfig_v1.html)
 * [v1alpha](http://googleapis.github.io/google-api-python-client/docs/dyn/osconfig_v1alpha.html)
 * [v1beta](http://googleapis.github.io/google-api-python-client/docs/dyn/osconfig_v1beta.html)
+* [v2beta](http://googleapis.github.io/google-api-python-client/docs/dyn/osconfig_v2beta.html)
 
 
 ## oslogin