chore(deps): update dependency pytest-cov to v6

Author: renovate[bot]

requirements-dev.txt

@@ -2,7 +2,7 @@
 coverage>=4.5.4
 pylint>=2.6.0,<3.0.0
 pytest>=8.3.5,<8.4.0
-pytest-cov>=2.2.1,<3.0.0
+pytest-cov>=6.2.1,<6.3.0
 pytest-rerunfailures>=3.1
 responses>=0.12.1,<1.0.0
 tox>=4.25.0,<4.26.0