[pgadmin-org/pgadmin4] ff4a40: Update release note

[Akshay Joshi]

  Branch: refs/heads/master
  Home:   https://github.com/pgadmin-org/pgadmin4
  Commit: ff4a409e271788d50729eb7783abd51c150416a2
      
https://github.com/pgadmin-org/pgadmin4/commit/ff4a409e271788d50729eb7783abd51c150416a2
  Author: Akshay Joshi <akshay.jo...@enterprisedb.com>
  Date:   2023-01-31 (Tue, 31 Jan 2023)

  Changed paths:
    M docs/en_US/release_notes_6_20.rst

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