Fix broken link to guidelines in readme

Author: bear454

README.rst

@@ -60,7 +60,7 @@ Contribute Code or Provide Feedback
 ===================================
 
 If you would like to become an active contributor to this project please
-follow the instructions provided in `Microsoft Azure Projects Contribution Guidelines <http://windowsazure.github.com/guidelines.html>`__.
+follow the instructions provided in `Microsoft Azure Projects Contribution Guidelines <http://azure.github.io/guidelines/>`__.
 
 If you encounter any bugs with the library please file an issue in the
 `Issues <https://github.com/Azure/azure-sdk-for-python/issues>`__