Update dependency sphinx to <7.4.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
sphinx (changelog)	<7.4.6 → <7.4.8

---

Release Notes

sphinx-doc/sphinx (sphinx)

v7.4.7: Sphinx 7.4.7

Compare Source

Changelog: https://www.sphinx-doc.org/en/master/changes.html

v7.4.6: Sphinx 7.4.6

Compare Source

Changelog: https://www.sphinx-doc.org/en/master/changes.html

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.05%. Comparing base (f188f57) to head (4a0a05b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1894   +/-   ##
=======================================
  Coverage   99.05%   99.05%           
=======================================
  Files         312      312           
  Lines       11740    11740           
=======================================
  Hits        11629    11629           
  Misses        111      111           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[DominicOram]

I think there are still issues here with sphinx-doc/sphinx#12660, needs investigation