Add link to release note.

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -39,7 +39,8 @@ Common Changes
     [azure_auth] to simplify installation of required packages for
     :ref:`Centralized Configuration Provider <configprovidermodules>`
     support and :ref:`Cloud Native Authentication <cloudnativemodules>`
-    support.
+    support
+    (`issue 512 <https://github.com/oracle/python-oracledb/issues/512>`__).
 #)  Fixed bug when attempting to execute an empty statement
     (`issue 525 <https://github.com/oracle/python-oracledb/issues/525>`__).
 #)  API documentation is now generated from the source code.