Update pytest-cov requirement from ~=3.0 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@v3.0.0...v4.1.0)

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

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

requirements-test.txt

@@ -6,5 +6,5 @@ mypy==1.0.0
 pylint~=2.15
 pylint-strict-informational==0.1
 pytest>=7.2
-pytest-cov~=3.0
+pytest-cov~=4.1
 pytest-homeassistant-custom-component>=0.12