Tell chart releaser to skip existing charts (newrelic#666)

Signed-off-by: Hannah Troisi <[email protected]>

Author: htroisi

.github/workflows/release-chart.yml

@@ -41,4 +41,5 @@ jobs:
       - name: Release workload charts
         uses: helm/[email protected]
         env:
+          CR_SKIP_EXISTING: true
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"