[3.9] gh-114021: Pin various sphinxcontrib extensions to older versions (GH-114022)

[AA-Turner]

(cherry picked from commit 94b1d1f)

• Issue: Doc build errors in CI due to updated sphinxcontrib-applehelp #114021

[m-aciek]

Suggested change

Jinja2<3.2

this constraint is superfluous; there's jinja2==3.0.3 in requirements.txt

[AA-Turner]

This is a backport, minimal changes are preferable.

[m-aciek]

We are introducing constraints.txt, I am wondering if we shouldn't convert current pins in requirements.txt of transitive dependencies to constraints.

# Docutils version is pinned to a version compatible with Sphinx
# version <3.5.4. It can be removed after bumping Sphinx version to at
# least 3.5.4.
docutils==0.17.1
# Jinja version is pinned to a version compatible with Sphinx version <4.5.
jinja2==3.0.3
# Alabaster version is pinned to a version compatible with Sphinx version 2.4.4.
alabaster==0.7.13

into

# docutils 1.18 is incompatible with Sphinx <3.5.4
docutils<1.18
# jinja2 3.1.0 is incompatible with Sphinx <4.5
jinja2<3.1.0
# alabaster 0.7.14 is incompatible with Sphinx 2.4.4
alabaster<0.7.14

in constraints.txt for consistency.

[AA-Turner]

This is a backport, minimal changes are preferable.