ci: update coverage to support py 3.11

Author: Kl0ven

poetry.lock

@@ -27,7 +27,7 @@ django-widget-tweaks = "^1.4"
 
 [tool.poetry.dev-dependencies]
 factory-boy = "^3.0"
-coverage = "^5.4"
+coverage = "^6.4"
 pytest = "^7"
 pytest-django = "^4.1"
 readme-renderer = "^28.0"