!8158 【OpenHarmony开源贡献者计划2022】+ 【doc文档错误】文档方法示例代码错误，onreconnect

Merge pull request !8158 from 五矿/master

zh-cn/application-dev/reference/apis/js-apis-service-extension-ability.md

@@ -192,7 +192,7 @@ onReconnect(want: Want): void;
 
   ```js
   class ServiceExt extends ServiceExtension {
-    onDisconnect(want) {
+    onReconnect(want) {
       console.log('onDisconnect, want:' + want.abilityName);
     }
   }