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Rename `ascon-hash` => `ascon-hash256` #1022

Job	Run time
set-msrv / set-msrv	6s
test (1.85.0)	49s
build (stable, wasm32-unknown-unknown)	14s
test (stable)	51s
build (1.85.0, wasm32-unknown-unknown)	25s
build (stable, thumbv7em-none-eabi)	17s
build (1.85.0, thumbv7em-none-eabi)	24s
	3m 6s

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