Fix range of allowed django versions

Running `docker-compose build` fails at the moment due to a package
resolution conflict. Allowing to use django 4.2 solves the issue.

Author: lullis

tests/app/idp/requirements.txt

@@ -1,5 +1,5 @@
-Django>=3.2,<4.2
+Django>=3.2,<=4.2
 django-cors-headers==3.14.0
 django-environ==0.11.2
 
--e ../../../
+-e ../../../