chore: bump base OS to 'bookworm' #636

Job	Run time
setup	4s
build (armbian/bananapim2zero)	26m 12s
build (armbian/orangepi3lts)	31m 43s
build (armbian/orangepi4lts)	31m 34s
build (armbian/orangepi_zero2)	31m 31s
build (raspberry/rpi32)	43m 25s
build (raspberry/rpi64)	45m 37s
build (raspberry/rpi64-ks)	52m 16s
build (raspberry/rpi64-bullseye)	36m 14s
build (armbian/orangepi4lts-bullseye)	26m 26s
	5h 25m 2s

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