[docs/zh] Update zh docs: synced to 6c879186 (#4117)

# Description

This PR updates the Chinese documentation to 6c879186 (the latest commit at present).

It also fixed a small typo in the original docs. Since the change is so minor, I didn't make a separate PR.

Last docs/zh update PR: #3884

## Checklist

Please put an x inside each checkbox to indicate that you've read and followed it: `[ ]` -> `[x]`

If this is a documentation change, only the first checkbox must be filled (you can delete the others if you want).

- [x] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md).

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4117
Co-authored-by: cdn0x12 <git@cdn0x12.dev>
Co-committed-by: cdn0x12 <git@cdn0x12.dev>

docs/locales/zh/getting_started/installation/metal.md

@@ -123,7 +123,7 @@ sudo usermod -a -G gotosocial gotosocial
 sudo chown -R gotosocial:gotosocial /gotosocial
 ```
 
-你可以在 [Codeberg](https://codeberg.org/superseriousbusiness/gotosocial/raw/branch/main/example/gotosocial.service) 或你的安装文件夹中的 `example` 文件夹中找到一个 `gotosocial.service` 文件。
+你可以在 [我们的 Codeberg 存储库](https://codeberg.org/superseriousbusiness/gotosocial/raw/branch/main/example/gotosocial.service) 或你的安装文件夹中的 `example` 文件夹中找到一个 `gotosocial.service` 文件。
 
 将它复制到 `/etc/systemd/system/gotosocial.service`：