New Helm chart version gets published before the images are pushed

[yiannistri]

Describe the bug

Whenever we make a new release, the new Helm chart is published before the images get pushed to ghcr.io. Pushing a new Helm chart version should be done after pushing the images.

[enekofb]

We have recently only seen this happening when the PR gets manually merged before the release job finishes. However, this ticket could be a good opportunity to add the chart published to the release workflow instead of its own one.