Bump `password-hash` dependency to v0.6.0-rc.0 #862

Job	Run time
build (1.72.0, thumbv7em-none-eabi)	18s
build (1.72.0, wasm32-unknown-unknown)	16s
build (stable, thumbv7em-none-eabi)	16s
build (stable, wasm32-unknown-unknown)	20s
test (1.72.0)	19s
test (stable)	18s
minimal-versions / minimal-versions	33s
	2m 20s

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