correct radiofruit board bootloader info (board not available)

Author: dhalbert

_data/bootloaders.json

@@ -177,7 +177,7 @@
         },
         "feather_radiofruit_zigbee": {
             "family": "atmel-samd",
-            "bootloader_id": "feather_m0",
+            "bootloader_id": "radiofruit_m0",
         },
         "feather_stm32f405_express": {
             "family": "atmel-samd",