md2

Bump `digest` to v0.11.0-pre.3; MSRV 1.71 #859

Job	Run time
minimal-versions / minimal-versions	37s
set-msrv / set-msrv	4s
build (1.65.0, thumbv7em-none-eabi)	1m 36s
test (1.65.0)	1m 50s
build (1.65.0, wasm32-unknown-unknown)	1m 34s
test (stable)	38s
build (stable, thumbv7em-none-eabi)	19s
build (stable, wasm32-unknown-unknown)	18s
	6m 56s

Provide feedback