Update aws_iot_simpletest.py

Author: bettse

examples/aws_iot_simpletest.py

@@ -7,7 +7,7 @@
 from adafruit_esp32spi import adafruit_esp32spi
 from adafruit_esp32spi import adafruit_esp32spi_wifimanager
 import adafruit_esp32spi.adafruit_esp32spi_socket as socket
-import adafruit_minimqtt as MQTT
+import adafruit_minimqtt.adafruit_minimqtt as MQTT
 from adafruit_aws_iot import MQTT_CLIENT
 
 ### WiFi ###