Document changes and release 5.11.11pureos1~amber1 of linux-librem5

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
2 jobs for pureos/5.11.11pureos1_amber1 in 98 minutes and 3 seconds (queued for 34 minutes and 33 seconds)
latest
Status Job ID Name Coverage
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passed #339595
librem5
build:aarch64

00:46:43

passed #339596
librem5:arm64
build:deb

01:07:59