Update dependency pytest to v9

Author: renovate[bot]

pyproject.toml

@@ -43,7 +43,7 @@ dev = [
   "mkdocstrings[python]==0.30.1",
   "mypy[faster-cache]==1.18.2",
   "pre-commit==4.4.0",
-  "pytest==8.4.2",
+  "pytest==9.0.0",
   "pytest-cov==7.0.0",
   "pytest-asyncio==1.2.0",
   "pytest-xdist==3.8.0",