!11191 【轻量级 PR】：update zh-cn/application-dev/reference/arkui-ts/ts-basic-components-datepicker.md.

Merge pull request !11191 from luoying_ace/N/A

zh-cn/application-dev/reference/arkui-ts/ts-basic-components-datepicker.md

@@ -69,7 +69,7 @@ struct DatePickerExample {
       DatePicker({
         start: new Date('1970-1-1'),
         end: new Date('2100-1-1'),
-        selected: this.selectedDate,
+        selected: this.selectedDate
       })
         .lunar(this.isLunar)
         .onChange((value: DatePickerResult) => {