Bump `hybrid-array` depenency to v0.2.0-pre.6 #1532

Job	Run time
build (1.41.0, thumbv7em-none-eabi)	13s
build (1.41.0, wasm32-unknown-unknown)	17s
build (stable, thumbv7em-none-eabi)	20s
build (stable, wasm32-unknown-unknown)	13s
test (1.41.0)	10s
test (stable)	20s
minimal-versions / minimal-versions	23s
	1m 56s

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