Bump pytest-cov from 4.1.0 to 6.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 4.1.0 to 6.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v4.1.0...v6.0.0)

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

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

requirements-testing.txt

@@ -1,5 +1,5 @@
 pytest==7.4.4
-pytest-cov==4.1.0
+pytest-cov==6.0.0
 pytest-pretty==1.2.0
 mypy==0.812;python_version<"3.9"
 mypy==1.11.2;python_version>"3.8"