update changelog

Author: legoguy1000

packages/gcp/changelog.yml

@@ -1,9 +1,9 @@
 # newer versions go on top
 - version: "2.11.4"
  changes:
- - description: Move GKE lightweight module config into integration
+ - description: Move PubSub lightweight module config into integration
  type: enhancement
- link: https://github.com/elastic/integrations/pull/1
+ link: https://github.com/elastic/integrations/pull/4267
 - version: "2.11.3"
  changes:
  - description: Move GKE lightweight module config into integration