Fix docstring

src/metldata/builtin_transformations/add_content_properties/main.py

@@ -38,7 +38,7 @@
 
 
 class AddContentPropertiesTransformer(DataTransformer[AddContentPropertiesConfig]):
-    """A transformer that deletes content properties from data."""
+    """A transformer that adds content properties to the data."""
 
     def transform(self, data: DataPack) -> DataPack:
         """Transforms data.