Updated release note.

Author: akshay-joshi

docs/en_US/release_notes_9_6.rst

@@ -22,6 +22,7 @@ New features
 
   | `Issue #5797 <https://github.com/pgadmin-org/pgadmin4/issues/5797>`_ -  Implemented a server-side cursor to enhance performance when retrieving large datasets.
   | `Issue #7979 <https://github.com/pgadmin-org/pgadmin4/issues/7979>`_ -  Added support for setting a custom SESSION_DIGEST_METHOD in pgAdmin 4 to facilitate FIPS compliance.
+  | `Issue #8941 <https://github.com/pgadmin-org/pgadmin4/issues/8941>`_ -  Enable the PKCE workflow for OAuth 2 authentication.
 
 Housekeeping
 ************
@@ -33,4 +34,5 @@ Bug fixes
 
   | `Issue #8420 <https://github.com/pgadmin-org/pgadmin4/issues/8420>`_ -  Fixed an issue where windows installer is not signing tmp files generated by InnoSetup.
   | `Issue #8675 <https://github.com/pgadmin-org/pgadmin4/issues/8675>`_ -  Fixed an issue in the Search Objects tool where selecting a node occasionally selected an incorrect node.
+  | `Issue #8901 <https://github.com/pgadmin-org/pgadmin4/issues/8901>`_ -  Improved the application state restoration by leveraging rc-dock layout and ensure the order and layout of tabs is maintained on restore.
   | `Issue #8914 <https://github.com/pgadmin-org/pgadmin4/issues/8914>`_ -  Update zstd library link to 1.5.7 in Dockerfile.