Bump `digest` to v0.11.0-pre.3; MSRV 1.71 #235

Job	Run time
minimal-versions / minimal-versions	42s
set-msrv / set-msrv	7s
test (1.71.0)	26s
build (1.71.0, thumbv7em-none-eabi)	17s
test (stable)	33s
build (1.71.0, wasm32-unknown-unknown)	24s
build (stable, thumbv7em-none-eabi)	30s
build (stable, wasm32-unknown-unknown)	18s
	3m 17s

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