Python: Accept .expected changes

Note that in this case, since there is a known `django.urls.path`
route-setup, we know that the request-handler will only be passed
keyword arguments, so it is not a mistake that `*args` is not considered
a routed-parameter here (although it certainly wouldn't have hurt us if
we did consider it a routed-parameter either).

python/ql/test/library-tests/frameworks/rest_framework/taint_test.py

@@ -90,7 +90,7 @@ def test_taint(request: Request, routed_param): # $ requestHandler routedParamet
 
 
 class MyClass(APIView):
-    def initial(self, request, *args, **kwargs): # $ requestHandler
+    def initial(self, request, *args, **kwargs): # $ requestHandler routedParameter=kwargs
         # this method will be called before processing any request
         ensure_tainted(request) # $ tainted