fix: Flexlayout to FlexLayout

Signed-off-by: Nzhumingxian <zhumingxian@ohos.com.cn>

en/readme/graphics.md

@@ -16,7 +16,7 @@ The related modules are described as follows:
 
 -   View: provides application components, including **UIView**, **UIViewGroup**, **UIButton**, **UILabel**, **UILabelButton**, **UIList**, and **UISlider**.
 -   Animator: defines functions for customizing animations.
--   Layout: lays out components, including **Flexlayout**, **GridLayout**, and **ListLayout**.
+-   Layout: lays out components, including **FlexLayout**, **GridLayout**, and **ListLayout**.
 -   Transform: rotates, translates, or scales images.
 -   Event: processes basic events, including click, press, drag, and long press events.
 -   Rendering engine: performs rendering and drawing operations.

zh-cn/readme/图形子系统.md

@@ -15,7 +15,7 @@
 
 -   View：应用组件，包括UIView、UIViewGroup、UIButton、UILabel、UILabelButton、UIList、UISlider等。
 -   Animator：动画模块，开发者可以自定义动画。
--   Layout：布局控件，包括Flexlayout、GridLayout、ListLayout等。
+-   Layout：布局控件，包括FlexLayout、GridLayout、ListLayout等。
 -   Transform：图形变换模块，包括旋转、平移、缩放等。
 -   Event：事件模块，包括click、press、drag、long press等基础事件。
 -   Rendering engine：渲染绘制模块。