Update dependency pytest to v9 [SECURITY]

Author: renovate[bot]

pyproject.toml

@@ -23,7 +23,7 @@ flake8-print = "^5.0.0"
 flake8-quotes = "^3.3.2"
 isort = "^5.11.4"
 mypy = "^1.0.0"
-pytest = "^8.0.0"
+pytest = "^9.0.0"
 types-markdown = "^3.4.2.1"
 types-pyyaml = "^6.0.12.2"
 pytest-cov = "^5.0.0"