Update docs/apm/real-user-monitoring/metrics.md

Author: kimsauce

docs/apm/real-user-monitoring/metrics.md

@@ -124,7 +124,7 @@ These CWV KPIs are captured and displayed on Overview dashboards for Document Lo
 ## XHR monitoring metrics
 
 :::note
-Currently, XHR metrics extraction in RUM is only supported for applications that use the `fetch` API to perform XHR calls. If your application uses `XMLHttpRequest`, metrics may not be collected at this time. A fix to support `XMLHttpRequest`-based calls is in progress and expected to roll out in mid 2025. We will update this page when that support becomes available.
+Currently, XHR metrics extraction in RUM is only supported for applications that use the [`fetch` API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) to perform XHR calls. If your application uses [`XMLHttpRequest`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest), metrics may not be collected at this time. A fix to support `XMLHttpRequest`-based calls is in progress and expected to roll out in mid 2025. We will update this page when that support becomes available.
 :::
 
 An XMLHttpRequest (XHR) is a way for browsers to communicate with a backend server without reloading the page. For example, a page may use XHR to update a price ticker automatically or after clicking an "Update Price" button.