update changelog with PR number

Author: leehinman

packages/cloudflare/changelog.yml

@@ -3,7 +3,7 @@
  changes:
  - description: Update Title and Description.
  type: enhancement
- link: https://github.com/elastic/integrations/pull/XXXXXXXXXX
+ link: https://github.com/elastic/integrations/pull/1960
 - version: "1.0.1"
  changes:
  - description: Fix logic that checks for the 'forwarded' tag