Bump the pip-dependencies group across 1 directory with 2 updates

Bumps the pip-dependencies group with 2 updates in the /third_party directory: [breathe](https://github.com/breathe-doc/breathe) and [sphinx](https://github.com/sphinx-doc/sphinx).


Updates `breathe` from 4.35.0 to 4.36.0
- [Release notes](https://github.com/breathe-doc/breathe/releases)
- [Changelog](https://github.com/breathe-doc/breathe/blob/main/CHANGELOG.rst)
- [Commits](breathe-doc/breathe@v4.35.0...v4.36.0)

Updates `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: breathe
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip-dependencies
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip-dependencies
...

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

Author: dependabot[bot]

third_party/requirements.txt

@@ -12,8 +12,8 @@ sphinxcontrib_devhelp==2.0.0
 sphinxcontrib_htmlhelp==2.1.0
 sphinxcontrib_serializinghtml==2.0.0
 sphinxcontrib_qthelp==2.0.0
-breathe==4.35.0
-sphinx==8.1.3
+breathe==4.36.0
+sphinx==8.2.1
 sphinx_book_theme==1.1.3
 # Spelling check in documentation
 pyenchant==3.2.2