fix the link;

Author: z7ye

docs/source/release_notes.rst

@@ -6,7 +6,7 @@ Release Notes
 -----
 Release date: January 18, 2023 
 
-* Added support for the :doc:`model version set <./user_guide/model_version_set/index.html>` feature.
+* Added support for the :doc:`model version set <./user_guide/model_version_set/index>` feature.
 * Added ``--job-info`` option to ``ads opctl run`` CLI to save job run information to a YAML file.
 * Added the `AuthContext <./ads.common.html#ads.common.auth.OCIAuthContext>`__ class. It supports API key configuration, resource principal, and instance principal authentication. In addition, predefined signers, callable signers, or API keys configurations from specified locations.
 * Fixed a bug in ``to_sql()``. The string length for the column created in Oracle Database table was counting characters, not bytes.