build(deps): bump pytest from 7.4.0 to 7.4.1 in /lib/spack/docs (#39790)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 7.4.0 to 7.4.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/7.4.0...7.4.1)

---
updated-dependencies:
- dependency-name: pytest
  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

@@ -6,7 +6,7 @@ python-levenshtein==0.21.1
 docutils==0.18.1
 pygments==2.16.1
 urllib3==2.0.4
-pytest==7.4.0
+pytest==7.4.1
 isort==5.12.0
 black==23.7.0
 flake8==6.1.0