Fix docstring

Co-authored-by: Leandro Lucarella <[email protected]>
Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

src/frequenz/sdk/timeseries/pv_pool/_pv_pool_reference_store.py

@@ -42,7 +42,7 @@ def __init__(  # pylint: disable=too-many-arguments
         power_manager_bounds_subs_sender: Sender[ReportRequest],
         component_ids: abc.Set[int] | None = None,
     ):
-        """Create an instance of the class.
+        """Initialize this instance.
 
         Args:
             channel_registry: A channel registry instance shared with the resampling