Bump `digest` to v0.11.0-pre.9 #77

Job	Run time
build (1.72.0, thumbv7em-none-eabi)	14s
test (1.72.0)	19s
build (1.72.0, wasm32-unknown-unknown)	13s
test (stable)	27s
build (stable, thumbv7em-none-eabi)	14s
build (stable, wasm32-unknown-unknown)	15s
	1m 42s

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