Create migration notes in Rust docs for v22 #4439

Job	Run time
semver-checks	5m 52s
cargo-deny (advisories)	36s
cargo-deny (bans licenses sources)	38s
build-fuzz	3m 0s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	8m 14s
check-git-rev-deps	14s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	4m 50s
docs	4m 23s
fmt	23s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	18m 34s
readme	2m 41s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	7m 37s
release-notes	24s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	4m 43s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	19m 31s
publish-dry-run	0s
complete	1s
	1h 21m 41s

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