Bump `password-hash` to v0.6.0-pre (#1461) #2221

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	1m 44s
build (1.60.0, wasm32-unknown-unknown)	1m 43s
derive (1.60.0)	1m 47s
build (stable, thumbv7em-none-eabi)	17s
doc	24s
derive (stable)	15s
build (stable, wasm32-unknown-unknown)	18s
test (1.60.0)	1m 49s
test (stable)	24s
minimal-versions / minimal-versions	24s
	9m 5s

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