Bump pytest-cov from 6.0.0 to 6.1.1 in the requirements group (#2960)

Bumps the requirements group with 1 update: [pytest-cov](https://github.com/pytest-dev/pytest-cov).


Updates `pytest-cov` from 6.0.0 to 6.1.1
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v6.0.0...v6.1.1)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 6.1.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: requirements
...

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

Author: dependabot[bot]

requirements_dev_optional.txt

@@ -11,7 +11,7 @@ types-setuptools
 pymongo==4.11.3
 # optional test requirements
 coverage
-pytest-cov==6.0.0
+pytest-cov==6.1.1
 pytest-doctestplus==1.4.0
 pytest-timeout==2.3.1
 h5py==3.13.0