update ts-components-canvas-imagebitmap.md

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/reference/arkui-ts/ts-components-canvas-imagebitmap.md

 # ImageBitmap
 
 
-> **NOTE**<br>
+> **NOTE**
+>
 > This component is supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
 
 
-**CanvasImageData** stores pixel data rendered on a canvas.
+An **ImageBitmap** object stores pixel data rendered on a canvas.
 
 
 ## Attributes
@@ -14,4 +15,3 @@
 | -------- | -------- | -------- |
 | width | number | Actual width of the rectangle on the canvas, in pixels. |
 | height | number | Actual height of the rectangle on the canvas, in pixels. |
-| data | &lt;Uint8ClampedArray&gt; | A one-dimensional array of color values. The values range from 0 to 255. |