Document changes and release 54pureos1 into byzantium
* defaults: ucm2: Rework ALSA UCM profiles
* default: pulse: Set modem input volume to 50%
* defaults: ucm2: Switch to headset mic automatically
* default: pulse: Use DGC and re-enable default echo-cancel options
* debian: Bump kernel dependency to 6.0.0pureos2
* librem5-base-defaults: Use librem5.state file to store ALSA state
* debian: Add `systemctl daemon-reload` to postinst and postrm
* defaults: ucm2: Don't set HPF to Application mode in Handset profile
* defaults: audio: Disable echo-cancel's digital gain control
Edited by Sebastian Krzyszkowiak