fix(CONTRIBUTING.md): fix incorrect file path (#5556)

CONTRIBUTING.md

@@ -69,7 +69,7 @@ $ npm run dev
 The preview page can preview all chart cases under `__tests__/plots` and switch through the drop-down box according to different focus points. Chart cases are divided into the following categories based on different focus points:
 
 - animation - Animation-related cases, placed under `__tests__/plots/animation`.
-- api - Chart API-related cases, placed under `__tests__/plots/tooltip`.
+- api - Chart API-related cases, placed under `__tests__/plots/api`.
 - interaction - Interaction-related cases, placed under `__tests__/plots/interaction`.
 - static - Static drawing-related cases, placed under `__tests__/plots/static`.
 - tooltip - Tooltip-related cases, placed under `__tests__/plots/tooltip`.

CONTRIBUTING.zh-CN.md

@@ -70,7 +70,7 @@ $ npm run dev
 预览界面可以预览 [`__tests__/plots`](./__tests__/plots) 下面的所有图表案例，并且通过下拉框进行切换。图表案例根据关注点不同，分为以下几类：
 
 - **animation** - 动画相关的案例，放在 [`__tests__/plots/animation`](./__tests__/plots/animation/) 下面。
-- **api** - Chart API 相关的案例，放在 [`__tests__/plots/tooltip`](./__tests__/plots/tooltip) 下面。
+- **api** - Chart API 相关的案例，放在 [`__tests__/plots/api`](./__tests__/plots/api) 下面。
 - **interaction** - 交互相关的案例，放在 [`__tests__/plots/interaction`](./__tests__/plots/interaction) 下面。
 - **static** - 静态绘制相关的案例，放在 [`__tests__/plots/static`](./__tests__/plots/static/) 下面。
 - **tooltip** - tooltip 相关的案例，放在 [`__tests__/plots/tooltip`](./__tests__/plots/tooltip/) 下面。