Bump sphinx to 8.1.3 along with required dependencies

[bdraco]

sphinx changelog: sphinx-doc/sphinx@v7.1.2...v8.1.3
sphinxcontrib-applehelp changelog: sphinx-doc/sphinxcontrib-applehelp@1.0.4...2.0.0
sphinxcontrib-devhelp changelog: sphinx-doc/sphinxcontrib-devhelp@1.0.2...2.0.0
sphinxcontrib-htmlhelp changelog: sphinx-doc/sphinxcontrib-htmlhelp@2.0.1...2.1.0
sphinxcontrib-qthelp changelog: sphinx-doc/sphinxcontrib-qthelp@1.0.3...2.0.0
sphinxcontrib-serializinghtml changelog: sphinx-doc/sphinxcontrib-serializinghtml@1.1.5...2.0.0
alabaster changelog: sphinx-doc/alabaster@0.7.13...1.0.0

[bdraco]

Haven't found anything concerning in the changelogs yet. Mostly dropping old Sphinx and Python versions

[bdraco]

Didn't see anything concerning in the docs preview either. All looks good

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.74%. Comparing base (7f92beb) to head (d643f3e).
Report is 2 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #10138   +/-   ##
=======================================
  Coverage   98.74%   98.74%           
=======================================
  Files         122      122           
  Lines       36956    36956           
  Branches     4411     4411           
=======================================
  Hits        36494    36494           
  Misses        315      315           
  Partials      147      147           

Flag	Coverage Δ
CI-GHA	98.63% <ø> (ø)
OS-Linux	98.32% <ø> (ø)
OS-Windows	96.17% <ø> (ø)
OS-macOS	97.43% <ø> (-0.01%)	⬇️
Py-3.10.11	97.27% <ø> (ø)
Py-3.10.15	97.81% <ø> (ø)
Py-3.11.10	97.85% <ø> (-0.06%)	⬇️
Py-3.11.9	97.31% <ø> (ø)
Py-3.12.7	98.37% <ø> (ø)
Py-3.13.0	97.18% <ø> (-0.01%)	⬇️
Py-3.13.1	98.34% <ø> (ø)
Py-3.9.13	97.19% <ø> (-0.01%)	⬇️
Py-3.9.20	97.73% <ø> (-0.05%)	⬇️
Py-pypy7.3.16	97.34% <ø> (-0.01%)	⬇️
VM-macos	97.43% <ø> (-0.01%)	⬇️
VM-ubuntu	98.32% <ø> (ø)
VM-windows	96.17% <ø> (ø)

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[codspeed-hq]

CodSpeed Performance Report

Merging #10138 will not alter performance

_{Comparing sphinx_8 (d643f3e) with master (7f92beb)}

Summary

✅ 47 untouched benchmarks

[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/dbd77ad6e46a0f89268758cdc06c20afeaf13e96/pr-10138

Backported as #10139

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.12: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.12/dbd77ad6e46a0f89268758cdc06c20afeaf13e96/pr-10138

Backported as #10140

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[Dreamsorcerer]

Not sure why dependabot is not updating that:

Shows a failure indicator, but doesn't show any recent runs or tell me what the problem is...