Bump `ecdsa` to v0.17.0-pre.4 #23

Job	Run time
build (1.73.0, thumbv7em-none-eabi)	14s
doc	7s
build (1.73.0, wasm32-unknown-unknown)	13s
build (stable, thumbv7em-none-eabi)	5s
test (1.73.0)	13s
build (stable, wasm32-unknown-unknown)	7s
test (stable)	7s
	1m 6s

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