fix grammar in error msg

adafruit_minimqtt/adafruit_minimqtt.py

@@ -931,7 +931,7 @@ def loop(self, timeout: float = 1.0) -> Optional[list[int]]:
         if timeout < self._socket_timeout:
             raise MMQTTException(
                 f"loop timeout ({timeout}) must be >= "
-                + f"than socket timeout ({self._socket_timeout}))"
+                + f"socket timeout ({self._socket_timeout}))"
             )
 
         self._connected()