Added await to async retrieve wrapper

Author: HowieG

src/multion/client.py

@@ -129,4 +129,4 @@ async def browse(self, *args, **kwargs):
     @wraps_function(BaseMultiOn.retrieve)
     async def retrieve(self, *args, **kwargs) -> RetrieveOutput:
         agentops.start_session(tags=["multion-sdk"])
-        return super().retrieve(*args, **kwargs)
+        return await super().retrieve(*args, **kwargs)