Updated release note.

Author: akshay-joshi

docs/en_US/release_notes_9_4.rst

@@ -30,3 +30,5 @@ Housekeeping
 Bug fixes
 *********
 
+  | `Issue #6564 <https://github.com/pgadmin-org/pgadmin4/issues/6564>`_ -  Fix the issue where an error is displayed when a table is dropped while a query is running.
+  | `Issue #8607 <https://github.com/pgadmin-org/pgadmin4/issues/8607>`_ -  Fixed an issue where the query tool returns "cannot unpack non-iterable Response object" when running any query with a database name change.