cmov: fix pr links in CHANGELOG #558

Job	Run time
build (1.60.0, thumbv7em-none-eabi)	52s
cross (aarch64-unknown-linux-gnu, 1.60.0)	1m 8s
build (1.60.0, wasm32-unknown-unknown)	47s
cross (aarch64-unknown-linux-gnu, stable)	41s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	1m 6s
build (stable, thumbv7em-none-eabi)	12s
cross (powerpc-unknown-linux-gnu, 1.60.0)	1m 4s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	43s
cross (powerpc-unknown-linux-gnu, stable)	27s
build (stable, wasm32-unknown-unknown)	11s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	1m 14s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	50s
minimal-versions / minimal-versions	35s
	9m 50s

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