changed size to match J20 size

Author: brentru

boards.txt

@@ -1072,7 +1072,7 @@ adafruit_pybadge_airlift_m4.vid.1=0x239A
 adafruit_pybadge_airlift_m4.pid.1=0x8043
 adafruit_pybadge_airlift_m4.upload.tool=bossac18
 adafruit_pybadge_airlift_m4.upload.protocol=sam-ba
-adafruit_pybadge_airlift_m4.upload.maximum_size=507904
+adafruit_pybadge_airlift_m4.upload.maximum_size=1032192
 adafruit_pybadge_airlift_m4.upload.offset=0x4000
 adafruit_pybadge_airlift_m4.upload.use_1200bps_touch=true
 adafruit_pybadge_airlift_m4.upload.wait_for_upload_port=true