fix pid for bootloader

Author: ladyada

boards.txt

@@ -103,7 +103,7 @@ adafruit_circuitplayground_m0.name=Adafruit Circuit Playground Express
 adafruit_circuitplayground_m0.vid.0=0x239A
 adafruit_circuitplayground_m0.pid.0=0x8018
 adafruit_circuitplayground_m0.vid.1=0x239A
-adafruit_circuitplayground_m0.pid.1=0x0018
+adafruit_circuitplayground_m0.pid.1=0x0019
 adafruit_circuitplayground_m0.upload.tool=bossac
 adafruit_circuitplayground_m0.upload.protocol=sam-ba
 adafruit_circuitplayground_m0.upload.maximum_size=262144