[webview部件】web DFX能力 支持web首屏检测通知

Signed-off-by: Nwangjing247 <wangjing247@huawei.com>

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

@@ -3101,8 +3101,7 @@ onAudioStateChanged(callback: (event: { playing: boolean }) => void)
 
 ### onFirstContentfulPaint<sup>10+</sup>
 
-onFirstContentfulPaint(callback: (event?: { navigationStartTick: number,
-      firstContentfulPaintMs: number }) => void)
+onFirstContentfulPaint(callback: (event?: { navigationStartTick: number, firstContentfulPaintMs: number }) => void)
 
 设置网页首次内容绘制回调函数。