Fix broken links (#1)

- Always use a relative markdown link so that we can jump even if we edit it in local env or read it in code hosting server.

Reviewed-on: https://gitea.com/gitea/docs/pulls/1

i18n/zh-cn/docusaurus-plugin-content-docs/version-1.19/development/hacking-on-gitea.md

@@ -243,7 +243,7 @@ make swagger-check
 ### 创建新的配置选项
 
 创建新的配置选项时，将它们添加到 `modules/setting` 的对应文件。您应该将信息添加到 `custom/conf/app.ini`
-并到[配置备忘单](administration/config-cheat-sheet.md)
+并到[配置备忘单](../administration/config-cheat-sheet.md)
 在 `docs/content/doc/advanced/config-cheat-sheet.en-us.md` 中找到
 
 ### 更改Logo