Bump `digest` to v0.11.0-pre.9 #1014

Job	Run time
minimal-versions / minimal-versions	40s
set-msrv / set-msrv	2s
build (1.71.0, thumbv7em-none-eabi)	26s
test (1.71.0)	34s
build (1.71.0, wasm32-unknown-unknown)	31s
test (stable)	37s
build (stable, thumbv7em-none-eabi)	18s
build (stable, wasm32-unknown-unknown)	19s
	3m 27s

Provide feedback