feat: Select versions of demos & stacks #249

Job	Run time
General Pull Request Checks / Run Cargo Deny (advisories)	44s
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	38s
General Pull Request Checks / Run Clippy	1m 21s
General Pull Request Checks / Run Rustfmt	13s
General Pull Request Checks / Run Cargo Udeps	1m 59s
General Pull Request Checks / Run RustDoc	2m 1s
General Pull Request Checks / Run Cargo Tests	1m 12s
General Pull Request Checks / All tests passed	1s
Helm Chart Check	16s
Publish amd64 Image	13m 34s
Publish arm64 Image	15m 29s
Build and publish manifest list	53s
	38m 21s

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