hotfix - fixed issue with identifying rpi zero w

* bug reported here: https://forum.dexterindustries.com/t/raspberry-pi-zero-w-and-pivotpi/3862/10?u=robertlucian

Author: RobertLucian

auto_detect_rpi.py

@@ -69,7 +69,7 @@
 
 "900093" : ["Pi Zero v1.3", "RPI0"],
 
-"0x9000C1" : ["Pi Zero W", "RPI0"],
+"9000C1" : ["Pi Zero W", "RPI0"],
 
 "a02082" : ["Pi 3 Model B", "RPI3"],
 "a22082" : ["Pi 3 Model B", "RPI3"],