signature: bump `digest` to v0.11.0-pre.3; MSRV 1.71 #1821

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 46s
build (1.65.0, wasm32-unknown-unknown)	1m 51s
minimal-versions	21s
build (stable, thumbv7em-none-eabi)	17s
test (1.65.0)	1m 50s
build (stable, wasm32-unknown-unknown)	17s
test (stable)	13s
	6m 35s

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