Fix some incorrect links in docs (#28191) (#28233)

Backport https://github.com/go-gitea/gitea/pull/28191

docs/content/administration/email-setup.zh-cn.md

@@ -55,7 +55,7 @@ PASSWD         = `password`
 
 要发送测试邮件以验证设置，请转到 Gitea > 站点管理 > 配置 > SMTP 邮件配置。
 
-有关所有选项的完整列表，请查看[配置速查表](doc/administration/config-cheat-sheet.zh-cn.md)。
+有关所有选项的完整列表，请查看[配置速查表](doc/administration/config-cheat-sheet.md)。
 
 请注意：只有在使用 TLS 或 `HOST=localhost` 加密 SMTP 服务器通信时才支持身份验证。TLS 加密可以通过以下方式进行：
 

docs/content/usage/authentication.en-us.md

@@ -198,7 +198,7 @@ administrative user.
     field is set to `mail.com`, then Gitea will expect the `user email` field
     for an authenticated GIT instance to be `gituser@mail.com`.[^2]
 
-**Note**: PAM support is added via [build-time flags](installation/install-from-source.md#build),
+**Note**: PAM support is added via [build-time flags](installation/from-source.md#build),
 and the official binaries provided do not have this enabled.  PAM requires that
 the necessary libpam dynamic library be available and the necessary PAM
 development headers be accessible to the compiler.