Fix if statement inside collection_allowed

dj_iconify/util.py

@@ -30,7 +30,7 @@ def collection_allowed(collection: str) -> bool:
     if collection in COLLECTIONS_DISALLOWED:
         return False
 
-    if COLLECTIONS_ALLOWED and collection not in COLLECTIONS_DISALLOWED:
+    if COLLECTIONS_ALLOWED and collection not in COLLECTIONS_ALLOWED:
         return False
 
     return True