[pgadmin-org/pgadmin4] 975bcd: Update release notes.

[Khushboo Vashi]

  Branch: refs/heads/master
  Home:   https://github.com/pgadmin-org/pgadmin4
  Commit: 975bcd9fb076701e55807dcfeba5a55ef06a281c
      
https://github.com/pgadmin-org/pgadmin4/commit/975bcd9fb076701e55807dcfeba5a55ef06a281c
  Author: Khushboo Vashi <khushboo.va...@enterprisedb.com>
  Date:   2023-09-26 (Tue, 26 Sep 2023)

  Changed paths:
    M docs/en_US/release_notes_7_8.rst

  Log Message:
  -----------
  Update release notes.