Bump `ecdsa` to v0.17.0-rc.9 (#1083) #443

Job	Run time
build (1.73.0, thumbv7em-none-eabi)	30s
build (1.73.0, wasm32-unknown-unknown)	31s
doc	1m 0s
build (stable, thumbv7em-none-eabi)	24s
build (stable, wasm32-unknown-unknown)	22s
test (i686-unknown-linux-gnu, 1.73.0, sudo apt update && sudo apt install gcc-multilib)	49s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 10s
test (x86_64-unknown-linux-gnu, 1.73.0)	35s
test (x86_64-unknown-linux-gnu, stable)	27s
	5m 48s

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