Remove the statement that callback URL is optional (#53209)

Co-authored-by: Sophie <[email protected]>

content/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-github-app-for-your-copilot-extension.md

@@ -28,11 +28,9 @@ Once you have configured your server and created your {% data variables.product.
 {% data reusables.apps.settings-step %}
 {% data reusables.apps.enterprise-apps-steps %}
 1. To the right of the {% data variables.product.prodname_github_app %} you want to configure for your {% data variables.product.prodname_copilot_extension_short %}, click **Edit**.
-1. In the "Identifying and authorizing users" section, under "Callback URL", enter your server's hostname, then click **Save changes**.
+1. In the "Identifying and authorizing users" section, under "Callback URL", enter your callback endpoint URL, then click **Save changes**.
 
-    > [!NOTE] This step is only required if you intend to request user authorization (OAuth) during installation.
-    >
-    > Your server's hostname is the forwarding endpoint that you copied from your terminal when you configured your server. For more information, see "[AUTOTITLE](/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-server-to-deploy-your-copilot-agent)."
+    > [!NOTE] Your server's hostname is the forwarding endpoint that you copied from your terminal when you configured your server. See "[AUTOTITLE](/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-server-to-deploy-your-copilot-agent)."
     >
     > If you are using an ephemeral domain in ngrok, you will need to update this URL every time you restart your ngrok server.
 
@@ -62,11 +60,9 @@ Once you have configured your server and created your {% data variables.product.
 {% data reusables.apps.settings-step %}
 {% data reusables.apps.enterprise-apps-steps %}
 1. To the right of the {% data variables.product.prodname_github_app %} you want to configure for your {% data variables.product.prodname_copilot_extension_short %}, click **Edit**.
-1. In the "Identifying and authorizing users" section, under "Callback URL", enter your server's hostname, then click **Save changes**.
+1. In the "Identifying and authorizing users" section, under "Callback URL", enter your callback endpoint URL, then click **Save changes**.
 
-    > [!NOTE] This step is only required if you intend to request user authorization (OAuth) during installation.
-    >
-    > Your server's hostname is the forwarding endpoint that you copied from your terminal when you configured your server. For more information, see "[AUTOTITLE](/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-server-to-deploy-your-copilot-agent)."
+    > [!NOTE] Your server's hostname is the forwarding endpoint that you copied from your terminal when you configured your server. See "[AUTOTITLE](/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-server-to-deploy-your-copilot-agent)."
     >
     > If you are using an ephemeral domain in ngrok, you will need to update this URL every time you restart your ngrok server.