Bump sphinx-mdinclude from 0.6.0 to 0.6.1

Bumps [sphinx-mdinclude](https://github.com/omnilib/sphinx-mdinclude) from 0.6.0 to 0.6.1.
- [Changelog](https://github.com/omnilib/sphinx-mdinclude/blob/main/CHANGELOG.md)
- [Commits](omnilib/sphinx-mdinclude@v0.6.0...v0.6.1)

---
updated-dependencies:
- dependency-name: sphinx-mdinclude
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -5,6 +5,6 @@ flit==3.7.1
 flake8==5.0.4
 mypy==0.971
 sphinx==7.3.7; python_version >= "3.9"
-sphinx-mdinclude==0.6.0
+sphinx-mdinclude==0.6.1
 ufmt==2.0.1
 usort==1.0.5