Bump `ecdsa` to v0.17.0-pre.4 #2135

Job	Run time
benches (1.73.0)	1m 21s
build (1.73.0, thumbv7em-none-eabi)	42s
benches (stable)	1m 16s
cross (armv7-unknown-linux-gnueabihf, 1.73.0)	1m 36s
build (1.73.0, wasm32-unknown-unknown)	44s
doc	54s
build (stable, thumbv7em-none-eabi)	39s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 18s
build (stable, wasm32-unknown-unknown)	40s
cross (aarch64-unknown-linux-gnu, 1.73.0)	1m 29s
test (i686-unknown-linux-gnu, 1.73.0, sudo apt update && sudo apt install gcc-multilib)	1m 47s
cross (aarch64-unknown-linux-gnu, stable)	1m 25s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 38s
cross (powerpc-unknown-linux-gnu, 1.73.0)	1m 30s
test (x86_64-unknown-linux-gnu, 1.73.0)	1m 29s
cross (powerpc-unknown-linux-gnu, stable)	1m 20s
test (x86_64-unknown-linux-gnu, stable)	1m 23s
	21m 11s

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