【OpenHarmony开源贡献者计划2022】update zh-cn/device-dev/porting/standard-system-porting-guide.md

https://gitee.com/openharmony/docs/issues/I5QVZWSigned-off-by: N小黄同学 <hys578084@126.com>

zh-cn/device-dev/porting/standard-system-porting-guide.md

@@ -30,10 +30,10 @@
       {
         "subsystem": "ace",
         "components": [
-          { "component": "ace_engine_lite", "features":[""] }
+          { "component": "ace_engine_lite", "features":[] }
         ]
-      }，
-	    …
+      },
+	...
     ]
 }