Bump `digest` dependency to v0.11.0-pre.7 #622

Job	Run time
minimal-versions / minimal-versions	30s
set-msrv / set-msrv	5s
test (1.74.0)	25s
build (1.74.0, thumbv7em-none-eabi)	19s
test (stable)	17s
build (1.74.0, wasm32-unknown-unknown)	20s
build (stable, thumbv7em-none-eabi)	13s
build (stable, wasm32-unknown-unknown)	19s
	2m 28s

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