【OpenHarmony开源贡献者计划2022】update zh-cn/application-dev/security/accesstoken-guidelines.md.

Json格式错误
Signed-off-by: NMM <xiaomin_77@163.com>

zh-cn/application-dev/security/accesstoken-guidelines.md

@@ -123,7 +123,7 @@
         "allowed-acls": [
             "ohos.permission.PERMISSION2"
         ]
-    },
+    }
 }
 ```