Install breaks during releases #855

This is not a big issue, but one that confused me for 10 minutes or so.

Similar to this issue, I was getting a 404 when installing using the suggested command:

$ helm plugin install https://github.com/databus23/helm-diff
Downloading https://github.com/databus23/helm-diff/releases/download/v3.13.0/helm-diff-macos-arm64.tgz
curl: (56) The requested URL returned error: 404
Failed to install helm-diff

When I came to repo, I saw the latest release was "14 minutes ago", with no assets. The CI was also failing, so I figured I just needed to wait for the assets to show up. A couple minutes later, yep, the assets showed up.

So the current release process temporarily breaks the default install/update path for ~15 minutes. Again, not a biggie, but it's now confused at least 2 people. Perhaps the artifact creation could be confirmed before creating the Release? That way the Release wouldn't exist without assets.