Update pytest-cov to 6.0.0 (#131518)

requirements_test.txt

@@ -20,7 +20,7 @@ pylint-per-file-ignores==1.3.2
 pipdeptree==2.23.4
 pytest-asyncio==0.24.0
 pytest-aiohttp==1.0.5
-pytest-cov==5.0.0
+pytest-cov==6.0.0
 pytest-freezer==0.4.8
 pytest-github-actions-annotate-failures==0.2.0
 pytest-socket==0.7.0