Update app_client.py (#994)

Author: npentrel

src/viam/app/app_client.py

@@ -2548,7 +2548,7 @@ async def rotate_key(self, id: str) -> Tuple[str, str]:
 
         ::
 
-            id, key = await cloud.rotate_key("key-id")
+            key, id = await cloud.rotate_key("key-id")
 
         Args:
             id (str): The ID of the key to be rotated.