style: format the repository with prettier

These files were already out of step with the project's Prettier config
before this branch of work; running `pnpm format` finally swept them up.
No semantic changes.

Kept separate from the functional commits so the reformatting does not
bury them in diff noise.

docs/zh-hans/opensource-projects/regions4j/index.mdx

@@ -23,12 +23,12 @@ import { Tabs, Tab } from "@rspress/core/theme"
 
 每个地区暴露四个属性：
 
-| 属性 | 类型 | 描述 | 示例 |
-|---|---|---|---|
-| `abbreviation` | String | ISO 3166-1 alpha-2 缩写 | `HK`、`US`、`GB`、`RU` |
-| `code` | String | ISO 3166-1 alpha-3 代码 | `HKG`、`USA`、`GBR`、`RUS` |
-| `callingCode` | String | E.164 国际拨号前缀 | `852`、`1`、`44`、`7` |
-| `locale` | String | 默认语言和地区标签 | `zh_HK`、`en_US`、`en_GB`、`ru_RU` |
+| 属性           | 类型   | 描述                    | 示例                               |
+| -------------- | ------ | ----------------------- | ---------------------------------- |
+| `abbreviation` | String | ISO 3166-1 alpha-2 缩写 | `HK`、`US`、`GB`、`RU`             |
+| `code`         | String | ISO 3166-1 alpha-3 代码 | `HKG`、`USA`、`GBR`、`RUS`         |
+| `callingCode`  | String | E.164 国际拨号前缀      | `852`、`1`、`44`、`7`              |
+| `locale`       | String | 默认语言和地区标签      | `zh_HK`、`en_US`、`en_GB`、`ru_RU` |
 
 ## 安装