[Renovate] Bump github actions only by Tag updates

[Max Stephan]

The Renovate Conifg shold be changed so that it bump a github action Version only if a new Release was been created.

Needet Config:

{
  "extends": ["helpers:pinGitHubActionDigests"]
}

See https://docs.renovatebot.com/modules/manager/github-actions/#additional-information for more information