Build factory.bin in every compile attempt

This is required to apply changes  which are maybe only related to  the data directory.

pio-scripts/create_factory_bin.py

@@ -130,4 +130,4 @@ def esp32_create_combined_bin(source, target, env):
     esptool.main(cmd)
 
 
-env.AddPostAction("$BUILD_DIR/${PROGNAME}.bin", esp32_create_combined_bin)
+env.AddPostAction("buildprog", esp32_create_combined_bin)