Added in description.

Accidentally deleted the line when resolving the merge conflict

Author: dcpena

src/content/changelogs/workers.yaml

@@ -15,6 +15,7 @@ entries:
     description: |-
       -  You can now connect your GitHub or GitLab repository to an existing Worker to automatically build and deploy your changes when you make a git push with [Workers Builds](/workers/ci-cd/builds/).
   - publish_date: "2024-09-20"
+    description: |-
       - Workers now support the [`handle_cross_request_promise_resolution`] compatibility flag which addresses certain edge cases around awaiting and resolving promises across multiple requests.
   - publish_date: "2024-09-19"
     description: |-