chore(deps): update dependency pytest to v9

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

poetry.lock

@@ -48,7 +48,7 @@ python-gitlab = ">=3.14.0"
 pre-commit = "^3.4.0 || ^4.0.0"
 black = "^22.8.0 || ^23.0.0 || ^24.0.0 || ^25.0.0"
 tox = "^4.0.0"
-pytest = "^7.1.3 || ^8.0.0"
+pytest = "^7.1.3 || ^8.0.0 || ^9.0.0"
 pytest-cov = "^4.1.0 || ^5.0.0 || ^6.0.0"
 ruff = "^0.0.285 || ^0.1.0 || ^0.2.0 || ^0.3.0 || ^0.4.0 || ^0.5.0 || ^0.6.0 || ^0.9.0 || ^0.10.0 || ^0.11.0 || ^0.12.0"
 responses = "^0.25.7"