Bump `digest` dependency to v0.11.0-pre.7 #919

Job	Run time
minimal-versions / minimal-versions	38s
set-msrv / set-msrv	3s
test (1.71.0)	36s
build (1.71.0, thumbv7em-none-eabi)	28s
test (stable)	27s
build (1.71.0, wasm32-unknown-unknown)	22s
build (stable, thumbv7em-none-eabi)	34s
build (stable, wasm32-unknown-unknown)	39s
	3m 47s

Provide feedback