Update URLs to django documn version

core/views/scans.py

@@ -288,7 +288,7 @@ def scansingle(request, path, file):
 
 def allscans(request):
     """Returns all the wallets in the system, we would like to use
-    the Django queryset SQL optimisation https://docs.djangoproject.com/en/3.2/ref/models/querysets/#prefetch-related
+    the Django queryset SQL optimisation https://docs.djangoproject.com/en/dev/ref/models/querysets/#prefetch-related
     to get the related singlescan and survexblock objects but that requires rewriting this to do the query on those, not on
     the wallets
     """