Fix broken link (#28496)

Author: drichards-87

Diff for: content/en/agent/faq/hostname-starting-with-ec2-default-prefix.md

@@ -2,4 +2,6 @@
 title: Config-provided hostname starting with `ip-` or `domu`
 ---
 
-See [Config-provided hostname starting with `ip-` or `domu`](https://github.com/DataDog/datadog-agent/blob/master/docs/agent/hostname_force_config_as_canonical.md).
+See [Config-provided hostname starting with `ip-` or `domu`][1].
+
+[1]: https://github.com/DataDog/datadog-agent/blob/main/docs/public/hostname/hostname_force_config_as_canonical.md