chore(deps): update dependency pytest to v9

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

pyproject.toml

@@ -23,7 +23,7 @@ documentation = "https://github.com/app-sre/gitlab-project-exporter"
 dev = [
     "httpx ~=0.28.1",
     "mypy ~=1.18.2",
-    "pytest ~=8.4.2",
+    "pytest ~=9.0.1",
     "pytest-cov ~=6.3.0",
     "pytest-mock ~=3.15.0",
     "responses ~=0.25.3",