Fix window.fence.setReportEventDataForAutomaticBeacons link (#1397)

Fenced_Frames_Ads_Reporting.md

@@ -224,7 +224,7 @@ registerAdBeacon({
 });
 ```
 
-The new events, if registered, implies that an automatic beacon will be sent by the browser to the registered URL when a top-level navigation is invoked from within the fenced frame and the navigation was preceded by a call to [window.fence.setReportEventDataForAutomaticBeacons](#api-to-populate-event-data-for-reservedtop_navigation). These events are not triggered by the fenced frame's initial navigation and commit (e.g. when rendering the original ad), only subsequent ones (e.g. when triggered by a user clicking on the ad). More specifically, a `reserved.top_navigation_start` beacon will be sent when a top-level navigation [begins](https://html.spec.whatwg.org/multipage/browsing-the-web.html#beginning-navigation) and a `reserved.top_navigation_commit` beacon will be sent when the navigation successfully [completes](https://html.spec.whatwg.org/multipage/browsing-the-web.html#ending-navigation). This will impact top-level navigation initiated from the fenced frame in the same tab (via [unfencedTop target](https://github.com/WICG/fenced-frame/blob/master/explainer/integration_with_web_platform.md#top-level-navigation)) or in a different tab. Note that this beacon is gated on a transient user activation (e.g. a click). More details about the beacon are below.
+The new events, if registered, implies that an automatic beacon will be sent by the browser to the registered URL when a top-level navigation is invoked from within the fenced frame and the navigation was preceded by a call to [window.fence.setReportEventDataForAutomaticBeacons](#api-to-populate-event-data-for-automatic-beacons). These events are not triggered by the fenced frame's initial navigation and commit (e.g. when rendering the original ad), only subsequent ones (e.g. when triggered by a user clicking on the ad). More specifically, a `reserved.top_navigation_start` beacon will be sent when a top-level navigation [begins](https://html.spec.whatwg.org/multipage/browsing-the-web.html#beginning-navigation) and a `reserved.top_navigation_commit` beacon will be sent when the navigation successfully [completes](https://html.spec.whatwg.org/multipage/browsing-the-web.html#ending-navigation). This will impact top-level navigation initiated from the fenced frame in the same tab (via [unfencedTop target](https://github.com/WICG/fenced-frame/blob/master/explainer/integration_with_web_platform.md#top-level-navigation)) or in a different tab. Note that this beacon is gated on a transient user activation (e.g. a click). More details about the beacon are below.
 
 ### reportEvent