Bump `digest` dependency to v0.11.0-pre.7 #920

Job	Run time
minimal-versions / minimal-versions	24s
set-msrv / set-msrv	2s
test (1.71.0)	28s
build (1.71.0, thumbv7em-none-eabi)	23s
test (stable)	18s
build (1.71.0, wasm32-unknown-unknown)	25s
build (stable, thumbv7em-none-eabi)	17s
build (stable, wasm32-unknown-unknown)	13s
	2m 30s

Provide feedback