Feature: Generate Helm Docs on Release

[PcInfamy]

Since the version number changes before release, it makes sense to automatically regenerate the helm docs in the release workflow. Should be relatively easy to do like this (might need a few tweaks):

# After "Add repositories" and before "Run chart-releaser"
- name: Generate chart docs (helm-docs)
  uses: norwoodj/helm-docs@v1.11.3
  with:
    chart-search-root: charts
    template-files: README.md.gotmpl
    output-file: README.md

- name: Commit updated docs (only if changed and not by bot)
  if: ${{ github.actor != 'github-actions[bot]' }}
  run: |
    if ! git diff --quiet; then
      git add -A
      git commit -m "chore(docs): regenerate chart README and version metadata [skip ci]"
      git push origin main
    fi

[jacobw]

Yeah this is a good idea. I'll try and find some time this weekend to look at it.