[3.12] GH-125722: Increase minimum supported Sphinx to 8.1.3 (GH-128922) - #129038

[3.12] GH-125722: Increase minimum supported Sphinx to 8.1.3 (GH-128922)#129038

AA-Turner merged 2 commits into

python:3.12python/cpython:3.12from

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