Django 5.0 isn't final yet

tox.ini

@@ -9,7 +9,7 @@ deps =
     dj32: Django>=3.2,<4.0
     dj41: Django>=4.1,<4.2
     dj42: Django>=4.2,<5.0
-    dj50: Django>=5.0,<5.1
+    dj50: Django>=5.0rc1,<5.1
     djmain: https://github.com/django/django/archive/main.tar.gz
     postgresql: psycopg2-binary
     mysql: mysqlclient