build(deps): bump mypy from 1.11.0 to 1.11.1 in /lib/spack/docs (#45530)

Bumps [mypy](https://github.com/python/mypy) from 1.11.0 to 1.11.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](https://github.com/python/mypy/compare/v1.11...v1.11.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

lib/spack/docs/requirements.txt

@@ -10,4 +10,4 @@ pytest==8.3.1
 isort==5.13.2
 black==24.4.2
 flake8==7.1.0
-mypy==1.11.0
+mypy==1.11.1