Bump `digest` to v0.11.0-pre.3; MSRV 1.71 #179

Job	Run time
minimal-versions / minimal-versions	40s
set-msrv / set-msrv	2s
test (1.65.0)	1m 50s
build (1.65.0, thumbv7em-none-eabi)	1m 35s
test (stable)	32s
build (1.65.0, wasm32-unknown-unknown)	1m 27s
build (stable, thumbv7em-none-eabi)	34s
build (stable, wasm32-unknown-unknown)	27s
	7m 7s

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