Add changelog entry for increased startup time

Author: mikenomitch

src/content/changelog/workers/2025-10-09-increased-startup-time.mdx renamed to src/content/changelog/workers/2025-10-10-increased-startup-time.mdx

@@ -3,11 +3,13 @@ title: Worker startup time increased to 1 second.
 description: Worker startup time has been increased from 400 ms to 1s.
 products:
   - workers
-date: 2025-10-09
+date: 2025-10-10
 ---
 
 import { Render, TypeScriptExample, WranglerConfig } from "~/components";
 
 You can now upload a Worker that takes up 1 second to parse and execute its global scope. Previously, startup time was limited to 400 ms.
 
+This allows you to run Workers that import more complex packages and execute more code prior to requests being handled.
+
 For more information, see the documentation on [Workers startup limits](/workers/platform/limits/#worker-startup-time).