[pgadmin-org/pgadmin4] 3515e7: Pin Sphinx version to 6.1.1

[Akshay Joshi]

  Branch: refs/heads/master
  Home:   https://github.com/pgadmin-org/pgadmin4
  Commit: 3515e742046edab0700e7df86ac0958c6d7d94d7
      
https://github.com/pgadmin-org/pgadmin4/commit/3515e742046edab0700e7df86ac0958c6d7d94d7
  Author: Akshay Joshi <akshay.jo...@enterprisedb.com>
  Date:   2023-01-09 (Mon, 09 Jan 2023)

  Changed paths:
    M .github/workflows/check-doc-build.yml

  Log Message:
  -----------
  Pin Sphinx version to 6.1.1