modify the docs of loadingprogress

Signed-off-by: NZhang-Dong-hui <zhangdonghui5@huawei.com>
Change-Id: I0af21f9abc1e84fd06af503e14246c785202a3e3

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

@@ -45,6 +45,7 @@ struct LoadingProgressExample {
       Text('Orbital LoadingProgress ').fontSize(9).fontColor(0xCCCCCC).width('90%')
       LoadingProgress()
         .color(Color.Blue)
+        .layoutWeight(1)
     }.width('100%').margin({ top: 5 })
   }
 }