Add Stackable vendor label to default values.yaml (#464) #1681

Job	Run time
Run Cargo Udeps	1m 36s
Run Clippy	26s
Run Rustfmt	11s
Run Cargo Deny (advisories)	43s
Run Cargo Deny (bans licenses sources)	46s
Select target helm repository based on action trigger	1s
Run Cargo Tests	34s
Run RustDoc	1m 2s
Check if committed Helm charts are up to date	42s
Check if committed README is the one we would render from the available parts	21s
All tests passed	1s
Package Charts, Build Docker Image and publish them	7m 34s
Run the OpenShift Preflight check on the published images	31s
	14m 28s

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