Bump sphinx from 8.1.3 to 8.2.1 (#495)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 8.1.3 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@v8.1.3...v8.2.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -26,7 +26,7 @@ Issues = "https://github.com/sloria/TextBlob/issues"
 Source = "https://github.com/sloria/TextBlob"
 
 [project.optional-dependencies]
-docs = ["sphinx==8.1.3", "sphinx-issues==5.0.0", "PyYAML==6.0.2"]
+docs = ["sphinx==8.2.1", "sphinx-issues==5.0.0", "PyYAML==6.0.2"]
 tests = ["pytest", "numpy"]
 dev = ["textblob[tests]", "tox", "pre-commit>=3.5,<5.0", "pyright", "ruff"]