chore(dependencies): PIP: Update sphinx requirement

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.

Updates `sphinx` to 8.2.1
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/v8.2.1/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v0.1.61611...v8.2.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  dependency-group: test-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

skore/sphinx-requirements.in

@@ -5,7 +5,7 @@ polars
 kaleido
 pydata-sphinx-theme
 sentence-transformers
-sphinx<8.2.0
+sphinx<8.3.0
 sphinx_autosummary_accessors
 sphinx-design
 sphinx-gallery