Fix tox dependency typo

Author: ianmeigh

tox.ini

@@ -25,7 +25,7 @@ basepython =
 deps =
     dj42: Django>=4.2,<4.3
     dj51: Django>=5.1,<5.2
-    dj52: Django>=5.2,<5,3
+    dj52: Django>=5.2,<5.3
     wt7: wagtail>=7.0,<7.1
 
 commands =