【OpenHarmony开源贡献者计划2022】 update zh-cn/application-dev/quick-start/stage-structure.md.

json示例错误
Signed-off-by: Nzzyinfo <zzy3306@qq.com>
Signed-off-by: Nzzyinfo <zzy3306@qq.com>

zh-cn/application-dev/quick-start/stage-structure.md

@@ -89,7 +89,7 @@ module.json5示例:
             "tv", 
             "wearable",
             "car",
-            "router",
+            "router"
         ],
         "deliveryWithInstall": true,
         "installationFree": false,