Bump sphinx from 6.1.3 to 7.1.0 (#686)

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 6.1.3 to 7.1.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v6.1.3...v7.1.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ian Hellen <ianhelle@microsoft.com>

docs/requirements.txt

@@ -14,5 +14,5 @@ typing-extensions>=4.2.0
 readthedocs-sphinx-ext==2.2.2
 seed_intersphinx_mapping
 sphinx-rtd-theme==1.2.2
-sphinx==6.1.3
+sphinx==7.1.0
 sphinxcontrib-jquery==4.1