!9317 【轻量级 PR】：【OpenHarmony开源贡献者计划2022】arkui-ts/Readme-CN.md 更正拼写错误

Merge pull request !9317 from gloria/N/A

zh-cn/application-dev/reference/arkui-ts/Readme-CN.md

@@ -132,7 +132,7 @@
 - 画布组件
     - [Canvas](ts-components-canvas-canvas.md)
     - [CanvasRenderingContext2D对象](ts-canvasrenderingcontext2d.md)
-    - [OffscreenCanvasRenderingConxt2D对象](ts-offscreencanvasrenderingcontext2d.md)
+    - [OffscreenCanvasRenderingContext2D对象](ts-offscreencanvasrenderingcontext2d.md)
     - [Lottie](ts-components-canvas-lottie.md)
     - [Path2D对象](ts-components-canvas-path2d.md)
     - [CanvasGradient对象](ts-components-canvas-canvasgradient.md)