I tried to search but it seems there is no trusted source to download firmware for m1 with the ZYNQ control board.
But I have a link for an SD card image for the ZYNQ control board if you want then check this link below.
- https://drive.google.com/drive/folders/1WzMHgzkESUVtZfUy7mGnBo1xMScTAqGA

Or try to explore from this link below if you can find the upgrade firmware for your unit.
- https://drive.google.com/drive/folders/1bMsnUToHKmEpIvxoVyJCUqHpnArec952