fix spelling

Author: AhmetNSimsek

siibra/features/feature.py

@@ -627,7 +627,7 @@ def _wrap_livequery_feature(feature: 'Feature', fid: str):
         See docstring of serialize_query_context for further context.
         """
 
-        # if you change the name of this calss, change the string in Feature.__init_subclass__
+        # if you change the name of this class, change the string in Feature.__init_subclass__
         class ProxyFeature(feature.__class__):
 
             # override __class__ property