Document changes and release 5.12.0~rc6pureos1~amber1 of linux-next-librem5

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
2 jobs for pureos/5.12.0_rc6pureos1_amber1 in 66 minutes and 25 seconds (queued for 7 minutes and 51 seconds)
latest
Status Job ID Name Coverage
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passed #339650
librem5
build:aarch64

00:37:40

passed #339651
librem5:arm64
build:deb

01:06:25