Update workers release notes 2024-09-20

Author: jasnell

src/content/changelogs/workers.yaml

@@ -5,6 +5,8 @@ productLink: "/workers/"
 productArea: Developer platform
 productAreaLink: /workers/platform/changelog/platform/
 entries:
+  - publish_date: "2024-09-20"
+      - 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: |-
       -  Revamped Workers and Pages UI settings to simplify the creation and management of project configurations. For bugs and general feedback, please submit this [form](https://forms.gle/XXqhRGbZmuzninuN9).