Update pytest-cov requirement from >=2.8.1 to >=7.1.0

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@v2.8.1...v7.1.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 7.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

kubernetes_asyncio/test-requirements.txt

@@ -1,3 +1,3 @@
 pytest~=4.6.7 # needed for python 2.7+3.4
-pytest-cov>=2.8.1
+pytest-cov>=7.1.0
 pytest-randomly==4.1.0 # needed for python 2.7+3.4