cipher: release v0.5.0-pre.8 (#1764) #2369

Job	Run time
test (1.85.0)	20s
build (1.85.0, thumbv7em-none-eabi)	17s
test (stable)	19s
build (1.85.0, wasm32-unknown-unknown)	18s
minimal-versions	45s
build (stable, thumbv7em-none-eabi)	18s
build (stable, wasm32-unknown-unknown)	22s
	2m 39s

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