Thoughts on replacing already published charts

[cep21]

Hi,

I'm comparing this to https://github.com/helm/chart-releaser-action and besides using github releases, one major difference is that this logic will replace an already published chart ( git add ${TARGET_DIR}) while the other will not change an existing release. I think not changing an existing release is the right thing to do with helm. Do you want to replicate this behavior here as well? If not, I'm curious why.

Thanks!