update pr number

Author: kcreddy

packages/m365_defender/changelog.yml

@@ -3,7 +3,7 @@
   changes:
     - description: Add email ECS fields to alert data stream.
       type: enhancement
-      link: https://github.com/elastic/integrations/pull/1
+      link: https://github.com/elastic/integrations/pull/12888
 - version: "2.22.1"
   changes:
     - description: Updated SSL description in package manifest.yml to be uniform and to include links to documentation.