Update packages/logstash/changelog.yml

Co-authored-by: Milton Hultgren <miltonhultgren@gmail.com>

Author: klacabane

packages/logstash/changelog.yml

@@ -3,7 +3,7 @@
   changes:
     - description: Add missing queue.capacity.* mappings
       type: bugfix
-      link: tbd
+      link: https://github.com/elastic/integrations/pull/9339
 - version: "2.4.1"
   changes:
     - description: Add missing host.ip field mapping