chore(ci): bump gateway-service image to 9ffdeb3 [skip ci]

Automated commit.

Author: github-actions[bot]

k8s/services/gateway-service/overlays/prod/deployment-patch.yaml

@@ -8,6 +8,6 @@ spec:
     spec:
       containers:
         - name: gateway-service
-          image: ghcr.io/heapdog/gateway-service-prod:latest
+          image: ghcr.io/heapdog/gateway-service-prod:9ffdeb316200278404add6364852ff486a6470bc
           imagePullPolicy: Always