Update dependency pytest to v9

Author: renovate[bot]

pyproject.toml

@@ -51,7 +51,7 @@ dev = [
     "notebook>=7.4.3,<8",
     "pre-commit>=4.0.1,<5",
     "pylint~=3.0",
-    "pytest>=8.0.0,<9",
+    "pytest>=9,<10",
     "pytest-cov>=6.0.0,<7",
     "pytest-mock>=3.8.2,<4",
     "python-dotenv>=1.0.0,<2",