[pgadmin-org/pgadmin4] 4bddb5: 1) Update version for release 7.3

[Akshay Joshi]

  Branch: refs/heads/master
  Home:   https://github.com/pgadmin-org/pgadmin4
  Commit: 4bddb5c36c9743331b8b6289ab68d48ed88eeb9a
      
https://github.com/pgadmin-org/pgadmin4/commit/4bddb5c36c9743331b8b6289ab68d48ed88eeb9a
  Author: Akshay Joshi <akshay.jo...@enterprisedb.com>
  Date:   2023-06-05 (Mon, 05 Jun 2023)

  Changed paths:
    M docs/en_US/release_notes_7_3.rst
    M web/config.py

  Log Message:
  -----------
  1) Update version for release 7.3
2) Update release note.