[Docs]Fix the error in the documentation (#3057)

packages/card/en-US.md

@@ -53,7 +53,7 @@ Use slot to custom content.
 | num | Number | `String | Number` | - |
 | price | Price | `String | Number` | - |
 | origin-price | Origin price | `String | Number` | - |
-| centered | Whether content vertical centered | `String` | `false` |
+| centered | Whether content vertical centered | `Boolean` | `false` |
 | currency | Currency symbol |  `String` | `¥` |
 | thumb-link | Thumb link URL | `String` | - |
 | lazy-load | Whether to enable thumb lazy load，should register [Lazyload](#/en-US/lazyload) component | `Boolean` | `false` |

packages/card/zh-CN.md

@@ -53,7 +53,7 @@ Vue.use(Card);
 | num | 商品数量 | `String | Number` | - | - |
 | price | 商品价格 | `String | Number` | - | - |
 | origin-price | 商品划线原价 | `String | Number` | - | 1.3.6 |
-| centered | 内容是否垂直居中 | `String` | `false` | - |
+| centered | 内容是否垂直居中 | `Boolean` | `false` | - |
 | currency | 货币符号 |  `String` | `¥` | - |
 | thumb-link | 点击左侧图片后的跳转链接 | `String` | - | 1.3.4 |
 | lazy-load | 是否开启图片懒加载，须配合 [Lazyload](#/zh-CN/lazyload) 组件使用 | `Boolean` | `false` | 1.5.0 |