sec1

Bump `rand` to v0.10.0-rc.8 #4457

Job	Run time
build (1.85.0, wasm32-unknown-unknown)	31s
test (stable)	1m 0s
build (stable, wasm32-unknown-unknown)	35s
build (stable, thumbv7em-none-eabi)	30s
build (1.85.0, thumbv7em-none-eabi)	34s
test (1.85.0)	1m 8s
minimal-versions	-1s
	4m 17s

Provide feedback