Bump codespell in /third_party in the pip-dependencies group

Bumps the pip-dependencies group in /third_party with 1 update: [codespell](https://github.com/codespell-project/codespell).


Updates `codespell` from 2.4.2 to 2.4.3
- [Release notes](https://github.com/codespell-project/codespell/releases)
- [Commits](codespell-project/codespell@v2.4.2...v2.4.3)

---
updated-dependencies:
- dependency-name: codespell
  dependency-version: 2.4.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-dependencies
...

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

Author: dependabot[bot]

third_party/requirements.txt

@@ -18,6 +18,6 @@ breathe==4.36.0
 sphinx==8.1.3
 sphinx_book_theme==1.1.3
 # Spelling check in documentation
-codespell==2.4.2
+codespell==2.4.3
 pyenchant==3.3.0
 sphinxcontrib-spelling==8.0.2