Comment out signing code we're not allowed to run yet

Author: cap10morgan

.github/workflows/release.yml

@@ -19,6 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: grafana/plugin-actions/build-plugin@release
-        with:
-          policy_token: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
-          attestation: true
+#     Uncomment once we're allowed to sign the plugin
+#        with:
+#          policy_token: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
+#          attestation: true