Fix <app_id> not appearing (#7730)

Author: Averave

docs/change-log/2025-07-30-remove-proxy-from-discord-activity-proxy-path.md

@@ -13,15 +13,15 @@ We've updated the Content Security Policy (CSP) for Discord Activities to remove
 Activities were required to make proxy requests through paths prefixed with `/.proxy/`:
 
 ```
-https://<app_id>.discordsays.com/.proxy/api/endpoint
+https://&lt;app_id&gt;.discordsays.com/.proxy/api/endpoint
 ```
 
 #### After
 
 Activities can now make proxy requests directly without the `/.proxy/` prefix:
 
 ```
-https://<app_id>.discordsays.com/api/endpoint
+https://&lt;app_id&gt;.discordsays.com/api/endpoint
 ```
 
 #### Technical Details