Bump sphinxcontrib-spelling

Bumps the pip-dependencies group in /third_party with 1 update: [sphinxcontrib-spelling](https://github.com/sphinx-contrib/spelling).


Updates `sphinxcontrib-spelling` from 8.0.0 to 8.0.1
- [Release notes](https://github.com/sphinx-contrib/spelling/releases)
- [Commits](sphinx-contrib/spelling@8.0.0...8.0.1)

---
updated-dependencies:
- dependency-name: sphinxcontrib-spelling
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

third_party/requirements.txt

@@ -17,4 +17,4 @@ sphinx==8.1.3
 sphinx_book_theme==1.1.3
 # Spelling check in documentation
 pyenchant==3.2.2
-sphinxcontrib-spelling==8.0.0
+sphinxcontrib-spelling==8.0.1