Update pytest-cov requirement from ~=4.0 to ~=4.1

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v4.0.0...v4.1.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements_dev.txt

@@ -2,4 +2,4 @@ pre-commit>=2.21.0,<3; python_version<"3.8"
 pre-commit~=3.3; python_version>="3.8"
 pylint~=2.17
 pytest~=7.3
-pytest-cov~=4.0
+pytest-cov~=4.1