Update pytest

Author: fabaff

pyproject.toml

@@ -28,7 +28,7 @@ yarl = "^1.8.0"
 
 [tool.poetry.dev-dependencies]
 black = "^25.12.0"
-pytest = "^8"
+pytest = "^9"
 pytest-httpx = ">0.15,<1"
 pytest-asyncio = "^0.15.1"