doc: fix changelog typo #477

Job	Run time
miri	15m 2s
minrust	2m 59s
loom	3m 5s
cross (i686-unknown-linux-gnu)	1m 51s
cross (armv7-unknown-linux-gnueabihf)	1m 45s
cross (powerpc-unknown-linux-gnu)	1m 59s
cross (powerpc64-unknown-linux-gnu)	1m 54s
cross (wasm32-unknown-unknown)	11s
nightly	4m 42s
rustfmt	18s
stable (ubuntu-latest)	2m 31s
stable (macos-latest)	3m 43s
stable (windows-latest)	7m 10s
tsan	4m 33s
Publish Documentation	2m 34s
	54m 17s

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