add some more linting

[clux]

for my own memory

see people using

• super-linter in charts https://github.com/prometheus-community/helm-charts/blob/main/.github/workflows/superlinter.yml
• ct for chart testing: https://github.com/prometheus-community/helm-charts/blob/main/.github/workflows/lint-test.yaml
  • we are in https://github.com/clux/homelab/blob/main/.github/workflows/release.yml
  • it's generally fine, just chokes whenever we touch a folder that we haven't bumped a version for