Fix docstring

Author: jenshnielsen

qcodes/instrument/delegate/delegate_instrument.py

@@ -121,7 +121,7 @@ def parse_instrument_path(parent: Union[Station, InstrumentBase], path: str) ->
         station.my_instrument.my_param
 
         Args:
-            station: Measurement station
+            parent: Measurement station
             path: Relative path to parse
         """
         def _parse_path(parent: Any, elem: Sequence[str]) -> Any: