Modify warning text (#2066)

firmware/tools/make_spi_image.py

@@ -92,7 +92,7 @@ def write_image(data, path):
 	val = int.from_bytes(snippet, byteorder='little')
 	checksum += val
 	if (val >= external_apps_address_start) and (val < external_apps_address_end) and ((val & 0xFFFF) < maximum_application_size):
-		print ("WARNING: External code address", hex(val), "at offset", hex(i), "in", sys.argv[3])
+		print ("WARNING: Possible external code address", hex(val), "at offset", hex(i), "in", sys.argv[3])
 
 final_checksum = 0
 checksum = (final_checksum - checksum) & 0xFFFFFFFF