[ferries] Point datakit smoke at the marin cluster

Switch IRIS_CONFIG from marin-dev.yaml to marin.yaml so the daily
smoke runs against the production cluster instead of the dev one.

Author: ravwojdyla

.github/workflows/marin-datakit-smoke.yaml

@@ -22,7 +22,7 @@ jobs:
       FERRY_STATUS_PATH: gs://marin-tmp-us-central1/ttl=1d/ci/datakit-smoke-${{ github.run_id }}-${{ github.run_attempt }}/ferry_run_status.json
       WANDB_ENTITY: marin-community
       WANDB_PROJECT: marin
-      IRIS_CONFIG: lib/iris/examples/marin-dev.yaml
+      IRIS_CONFIG: lib/iris/examples/marin.yaml
       IRIS_CONTROLLER_SERVICE_ACCOUNT: iris-controller@hai-gcp-models.iam.gserviceaccount.com
 
     steps: