[pgadmin-org/pgadmin4] 428e43: Update release note

[Akshay Joshi]

  Branch: refs/heads/master
  Home:   https://github.com/pgadmin-org/pgadmin4
  Commit: 428e4327323263db24040565b052a25cffb8c9c9
      
https://github.com/pgadmin-org/pgadmin4/commit/428e4327323263db24040565b052a25cffb8c9c9
  Author: Akshay Joshi <akshay.jo...@enterprisedb.com>
  Date:   2023-02-10 (Fri, 10 Feb 2023)

  Changed paths:
    M docs/en_US/release_notes_6_21.rst

  Log Message:
  -----------
  Update release note