Skip existing releases (#272)

Author: atye

.github/workflows/charts-release-action.yml

@@ -28,5 +28,6 @@ jobs:
         uses: helm/chart-releaser-action@v1.0.0
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_SKIP_EXISTING: "true"
         with:  
           charts_dir: charts