UF2 bootloader for the Striso board.

Only necessary on older Striso boards where no UF2 bootloader is installed yet.

Reset the Striso board into DFU mode by pressing the round button while plugging in and upload the .bin with dfu-util:

dfu-util -d0483:df11 -a0 -s0x8000000:leave -D bootloader_striso_v2.8-0-g526a594.bin

To check the bootloader is installed correctly, plug in the Striso board with the square button pressed, now a USB drive named 'Striso FW' should appear.