use staging

Author: robtaylor

.github/workflows/main.yaml

@@ -47,6 +47,7 @@ jobs:
     uses: ./.github/workflows/test-examples.yml
     with:
       CHIPFLOW_BACKEND_VERSION: 'branch-opentracing-batch'
+      CHIPFLOW_ENDPOINT: "https://build-staging.chipflow.org"
     secrets:
-      CHIPFLOW_API_KEY: ${{ secrets.CHIPFLOW_API_KEY}}
+     CHIPFLOW_API_KEY: ${{ secrets.CHIPFLOW_API_KEY_STAGING}}