Update dependency pytest-cov to v6.3.0

Author: renovate[bot]

requirements.txt

@@ -18,7 +18,7 @@ pyflakes==3.4.0
 pylint==3.3.8
 pyright==1.1.405
 pytest==8.4.2
-pytest-cov==6.2.1
+pytest-cov==6.3.0
 tomli==2.2.1
 tomlkit==0.13.3
 typing_extensions==4.15.0