chore(deps): update swatinem/rust-cache action to v2.8.0 #399

Job	Run time
General Pull Request Checks / Run Cargo Tests	4m 26s
General Pull Request Checks / Run Cargo Udeps	9m 10s
General Pull Request Checks / Run Cargo Deny (advisories)	46s
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	44s
General Pull Request Checks / Run RustDoc	5m 14s
General Pull Request Checks / All tests passed	4s
Build stackablectl for x86_64-unknown-linux-gnu	3m 41s
Build stackablectl for aarch64-apple-darwin	4m 19s
Build stackablectl for x86_64-apple-darwin	4m 36s
Build stackablectl for aarch64-unknown-linux-gnu	4m 8s
	37m 8s

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