Bump `digest` to v0.11.0-pre.3; MSRV 1.71 #231

Job	Run time
minimal-versions / minimal-versions	31s
set-msrv / set-msrv	7s
build (1.65.0, thumbv7em-none-eabi)	1m 30s
build (1.65.0, wasm32-unknown-unknown)	1m 41s
test (1.65.0)	1m 42s
build (stable, thumbv7em-none-eabi)	23s
test (stable)	29s
build (stable, wasm32-unknown-unknown)	29s
	6m 52s

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