Update recommended allowed URLs for Copilot to support EMUs (#54189)

Author: isaacmbrown

content/copilot/managing-copilot/managing-github-copilot-in-your-organization/configuring-your-proxy-server-or-firewall-for-copilot.md

@@ -15,6 +15,7 @@ If your company employs security measures like a firewall or proxy server, you s
 | Domain and/or URL                      | Purpose |
 | :------------------------------------- | :--------------------------------- |
 | `https://github.com/login/*`             | Authentication |
+| `https://github.com/enterprises/YOUR-ENTERPRISE/*` | Authentication for {% data variables.enterprise.prodname_managed_users %}, only required with {% data variables.product.prodname_emus %} |
 | `https://api.github.com/user`             | User Management |
 | `https://api.github.com/copilot_internal/*` | User Management |
 | `https://copilot-telemetry.githubusercontent.com/telemetry` | Telemetry |