Use correct option to send to lone user

signal_webhook/signal.py

@@ -11,7 +11,7 @@ def signal_send(recipients: list[str], message: str) -> None:
     def to_dest(recipient: str) -> dict[str, str]:
         if recipient.startswith("G:"):
             return {"groupId": recipient[2:]}
-        return {"userId": recipient}
+        return {"recipient": [recipient]}
 
     with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as signal_json:
         signal_json.connect(configuration.SIGNAL_SOCKET)