Update PR link in Changelog

Author: devamanv

packages/rubrik/changelog.yml

@@ -4,7 +4,7 @@
     - description: |
         Fix CEL program for Tasks data stream to parse long values.
       type: bugfix
-      link: https://github.com/elastic/integrations/pull/13098
+      link: https://github.com/elastic/integrations/pull/15909
 - version: "0.9.1"
   changes:
     - description: |