fix: [stix2 import] Fixed registry key values mapping name

- Following 596143e where we fixed the mapping
  in the parent mapping, but we forgot to change
  it also in the indicators mapping

Author: chrisr3d

misp_stix_converter/stix2misp/converters/stix2_indicator_converter.py

@@ -1415,7 +1415,7 @@ def reddit_account_pattern_mapping(cls, field: str) -> Union[dict, None]:
     @classmethod
     def registry_key_values_pattern_mapping(
             cls, field: str) -> Union[dict, None]:
-        return cls.registry_key_values_mapping().get(field)
+        return cls.registry_key_values_object_mapping().get(field)
 
     @classmethod
     def sigma_object_mapping(cls) -> dict: