docs: update the stackablectl installation command to use the latest release #89

Job	Run time
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	47s
General Pull Request Checks / Run Cargo Deny (advisories)	47s
General Pull Request Checks / Run Cargo Udeps	9m 5s
General Pull Request Checks / Run RustDoc	4m 41s
General Pull Request Checks / Run Cargo Tests	3m 55s
General Pull Request Checks / All tests passed	3s
	19m 18s

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