chore: Enable tests für python 3.11

.gitlab-ci.yml

@@ -14,7 +14,7 @@ test:
   stage: test
   parallel:
     matrix:
-      - PY_VER: ["3.7", "3.8", "3.9", "3.10"]
+      - PY_VER: ["3.7", "3.8", "3.9", "3.10", "3.11"]
   image: $CI_REGISTRY/funkwhale/backend-test-docker:$PY_VER
   before_script: 
     - poetry install