[apfbug] beta 4 (for Tiliqua R2/R3/R4)

What's Changed

• Make sure to flash the correct .uf2 for your hardware revision to the RP2040.
• apfbug: pull upstream bugfixes, fix autosuspend disconnects by @vk2seb in #8

Full Changelog: apfbug-beta3...apfbug-beta4