fix mqtt import

Author: brentru

PyPortal_MQTT_Control/code.py

@@ -12,7 +12,7 @@
 from adafruit_display_text.label import Label
 from adafruit_button import Button
 import adafruit_touchscreen
-from adafruit_minimqtt import MQTT
+import adafruit_minimqtt.adafruit_minimqtt as MQTT
 
 # ------------- WiFi ------------- #