Bump `password-hash` dependency to v0.6.0-rc.0 #923

Job	Run time
build (1.72.0, thumbv7em-none-eabi)	23s
test (1.72.0)	39s
build (1.72.0, wasm32-unknown-unknown)	16s
test (stable)	53s
build (stable, thumbv7em-none-eabi)	17s
build (stable, wasm32-unknown-unknown)	25s
minimal-versions / minimal-versions	1m 48s
	4m 41s

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