fix PR id in changelog

Author: stefans-elastic

packages/vsphere/changelog.yml

@@ -3,7 +3,7 @@
  changes:
  - description: Updated vSphere supported versions in documentation.
  type: bugfix
- link: https://github.com/elastic/integrations/pull/1
+ link: https://github.com/elastic/integrations/pull/13401
 - version: "1.18.1"
  changes:
  - description: Updated SSL description to be uniform and to include links to documentation.