Incompatible Sphinx Version for Building Docs

[BhagwatiOracle]

While trying to build the documentation using make html, the build fails because the project currently uses Sphinx v4.3.0, but the extension sphinxcontrib.applehelp requires Sphinx v5.0 or higher.

[Rishabhsaini21]

Update: I opened a PR to fix the docs build. The PR upgrades Sphinx to version 5 and replaces sphinx-panels with sphinx-design.

PR : #9387