chore(demo-nginx): Update image to main-11

apps/demo-nginx/deployment.yaml

@@ -20,7 +20,7 @@ spec:
     spec:
       containers:
       - name: nginx
-        image: nginx:1.25.3  # This will be updated by Jenkins pipeline
+        image: docker.io/vladcrypto/demo-nginx:main-11
         ports:
         - containerPort: 80
           name: http