fix: skip releasing charts when one exists

Author: joshgamache

.github/workflows/release.yaml

@@ -41,6 +41,7 @@ jobs:
           charts_dir: helm
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_SKIP_EXISTING: true # Skips charts if the release already exists
   cas-airflow-build:
     needs: [release]
     runs-on: ubuntu-latest