Bump pytest-cov from 4.1.0 to 5.0.0 (zarr-developers#1722)

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 4.1.0 to 5.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v4.1.0...v5.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements_dev_optional.txt

@@ -14,7 +14,7 @@ types-setuptools
 pymongo==4.6.2
 # optional test requirements
 coverage
-pytest-cov==4.1.0
+pytest-cov==5.0.0
 pytest-doctestplus==1.2.1
 pytest-timeout==2.3.1
 h5py==3.10.0