Update README.md

Author: busunkim96

docs/README.md

@@ -37,5 +37,5 @@ Learn how to use the Google API Python Client with these guides:
 
 ### Reference Documentation
 
-- Reference documentation for the the core library [googleapiclient](http://googleapis.github.io/google-api-python-client/docs/epy/index.html),
+- Reference documentation for the the core library [googleapiclient](http://googleapis.github.io/google-api-python-client/docs/epy/index.html).
 - [Library reference documentation by API](dyn/index.md).