Create migration notes in Rust docs for v22 #4436

Job	Run time
check-git-rev-deps	16s
build-fuzz	2m 44s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	8m 4s
cargo-deny (advisories)	49s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	5m 4s
cargo-deny (bans licenses sources)	40s
docs	4m 23s
fmt	24s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	17m 26s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	7m 41s
publish-dry-run	0s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	4m 40s
readme	2m 51s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	19m 4s
release-notes	27s
semver-checks	5m 44s
complete	1s
	1h 20m 18s

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