fix: 使用正确的 Kong 官方镜像 kong:3.4

- 从 kong/kong-gateway:3.4 改为 kong:3.4 (官方镜像)
- 参考: https://hub.docker.com/_/kong

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -103,7 +103,7 @@ services:
       - iconsulting-network
 
   kong:
-    image: kong/kong-gateway:3.4
+    image: kong:3.4
     container_name: iconsulting-kong
     restart: unless-stopped
     depends_on: