docs: Add release notes for stackablectl #414

Job	Run time
General Pull Request Checks / Run Cargo Udeps	2m 29s
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	45s
General Pull Request Checks / Run Cargo Deny (advisories)	45s
General Pull Request Checks / Run RustDoc	1m 53s
General Pull Request Checks / Run Cargo Tests	1m 11s
General Pull Request Checks / All tests passed	4s
Build stackablectl for aarch64-unknown-linux-gnu	2m 12s
Build stackablectl for aarch64-apple-darwin	1m 10s
Build stackablectl for x86_64-unknown-linux-gnu	1m 6s
Build stackablectl for x86_64-apple-darwin	2m 26s
	14m 1s

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