Add PR link to changelog

Author: moxarth-rathod

packages/box_events/changelog.yml

@@ -6,7 +6,7 @@
         Following fields will no longer be available:
         `related.location.lat`, `related.location.lon`, `related.description`, `related.indicator_type`.
       type: breaking-change
-      link: https://github.com/elastic/integrations/pull/1
+      link: https://github.com/elastic/integrations/pull/15947
 - version: "2.15.1"
   changes:
     - description: Fix the description of the interval setting.