Bump sphinx from 7.4.7 to 8.1.3 #1024

Job	Run time
Code style	1m 7s
Documentation style	14s
Documentation Build (mock examples)	2m 4s
Update CHANGELOG for new tag	0s
Build wheelhouse for latest Python versions (ubuntu-latest, 3.10)	19s
Build wheelhouse for latest Python versions (ubuntu-latest, 3.11)	17s
Build wheelhouse for latest Python versions (ubuntu-latest, 3.12)	26s
Build wheelhouse for latest Python versions (ubuntu-latest, 3.13)	30s
Build wheelhouse for latest Python versions (windows-latest, 3.10)	1m 28s
Build wheelhouse for latest Python versions (windows-latest, 3.11)	1m 22s
Build wheelhouse for latest Python versions (windows-latest, 3.12)	1m 27s
Build wheelhouse for latest Python versions (windows-latest, 3.13)	2m 15s
Tests Python 3.10, ubuntu-latest	20s
Tests Python 3.11, ubuntu-latest	18s
Tests Python 3.12, ubuntu-latest	21s
Tests Python 3.13, ubuntu-latest	30s
Tests Python 3.10, windows-latest	56s
Tests Python 3.11, windows-latest	37s
Tests Python 3.12, windows-latest	42s
Tests Python 3.13, windows-latest	1m 26s
Build library	18s
Server checks	0s
Publish dev build to private PyPI	0s
Deploy development documentation	0s
Release	0s
Deploy stable documentation	0s
	16m 57s

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