chore: fix versioning of Sphinx in GH Actions

[Venefilyn]

Jira Issues:

Checklist

• PR has been tested manually in a VM (either author or reviewer)
• Jira issue has been made public if possible
• [RHELC-] or [HMS-] is part of the PR title
• GitHub label has been added to help with Release notes
• PR title explains the change from the user's point of view
• Code and tests are documented properly
• The commits are squashed to as few commits as possible (without losing data)
• When merged: Jira issue has been updated to Release Pending if relevant

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.83%. Comparing base (9c4e6c0) to head (9f95685).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1262   +/-   ##
=======================================
  Coverage   95.83%   95.83%           
=======================================
  Files          55       55           
  Lines        4756     4756           
  Branches      836      836           
=======================================
  Hits         4558     4558           
  Misses        112      112           
  Partials       86       86           

Flag	Coverage Δ
centos-linux-7	91.02% <ø> (ø)
centos-linux-8	91.95% <ø> (ø)
centos-linux-9	92.00% <ø> (ø)

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[Venefilyn]

Marking as ready for now @bookwar @r0x0d. I think we can fix the issues of not recognizing stuff in a different PR as it requires a bit more work. But this should at least make it a tiny bit better and allow us to open the HTML out locally a bit faster

[has-bot]

This PR does not require integration tests to be run.

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[r0x0d]

Just resolving the conflicts and I think we can merge, @Venefilyn.