pip: bump sphinx-intl from 2.3.2 to 2.4.0 in the pip-packages group (#309)

Bumps the pip-packages group with 1 update: [sphinx-intl](https://github.com/sphinx-doc/sphinx-intl).


Updates `sphinx-intl` from 2.3.2 to 2.4.0
- [Release notes](https://github.com/sphinx-doc/sphinx-intl/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx-intl/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx-intl@2.3.2...2.4.0)

---
updated-dependencies:
- dependency-name: sphinx-intl
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip-packages
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -2,5 +2,5 @@ polib==1.2.0
 pomerge==0.2.1
 potodo==0.35
 powrap==1.0.2
-sphinx-intl==2.3.2
+sphinx-intl==2.4.0
 sphinx-lint==1.0.2