Apply suggestion from @llucax

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

src/frequenz/sdk/microgrid/_old_component_data.py

@@ -152,7 +152,7 @@ def _check_category(cls, component_id: ComponentId) -> None:
             ValueError: if the given id is unknown or has a different type.
         """
         # pylint: disable-next=import-outside-toplevel,cyclic-import
-        from frequenz.sdk import microgrid
+        from .. import microgrid
 
         components = microgrid.connection_manager.get().component_graph.components(
             filter_by_ids={component_id}