Change the GitHub Actions bot comment to directly point to the full
firmware DFU download link.
Include a pointer to the qFlipper documentation to guide folks towards
installing the DFU file.
The WebUSB flashing link can be restored in the future if it returns.
See https://forum.flipperzero.one/t/no-database-found-after-firmware-update/1761/6
Co-authored-by: あく <alleteam@gmail.com>
