Update notes for submitted changes

* [BUGFIX][Cache][PDO] Duplicate cache entry possible
Update notes for submitted changes

* [BUGFIX][Cache][PDO] Duplicate cache entry possible
Update notes for submitted changes

* [BUGFIX][Cache][PDO] Duplicate cache entry possible
Update notes for submitted changes

* [BUGFIX][Cache][PDO] Duplicate cache entry possible
Update notes for submitted changes

* [BUGFIX] Follow-up clean up to #24389