docs: only run chart lint if changed

If no change on the chart was detected the linting should not be executed

related to helm#105

Signed-off-by: Marco Lecheler <marco@task.media>

README.md

@@ -63,6 +63,7 @@ jobs:
           fi
 
       - name: Run chart-testing (lint)
+        if: steps.list-changed.outputs.changed == 'true'
         run: ct lint --target-branch ${{ github.event.repository.default_branch }}
 
       - name: Create kind cluster