fix: use tag ref for helm-release so the release workflow can start it (

linode#216)

Co-authored-by: Ryan Lonergan <rlonerga@akamai.com>

.github/workflows/helm.yml

@@ -47,7 +47,7 @@ jobs:
       #  run: ct install --chart-dirs helm-chart --namespace kube-system --helm-extra-set-args "--set=apiToken=test --set=region=us-east"  --target-branch ${{ github.event.repository.default_branch }}
 
   helm-release:
-    if: github.ref == 'refs/heads/main'
+    if: ${{ startsWith(github.ref, 'refs/tags/') }}
     needs: helm-test
     permissions:
       contents: write  # for helm/chart-releaser-action to push chart release and create a release