Bump `hybrid-array` to v0.2.0-pre.8 #1857

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 25s
build (1.65.0, wasm32-unknown-unknown)	1m 25s
build (stable, thumbv7em-none-eabi)	16s
minimal-versions	44s
build (stable, wasm32-unknown-unknown)	17s
test (1.65.0)	15s
test (stable)	22s
	4m 44s

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