Added changelog entry

Author: 3kt

packages/ess_billing/changelog.yml

@@ -1,9 +1,9 @@
 # newer versions go on top
 - version: "1.7.0"
   changes:
-    - description: Added tags for ECH
+    - description: Added deployment tags for ECH
       type: enhancement
-      link: TODO
+      link: https://github.com/elastic/integrations/pull/15950
 - version: "1.6.0"
   changes:
     - description: Update codeowners