Update configuration.mdx (#18594)

Made "Worker" singular to agree with "a"

Author: cf-scott

src/content/docs/cloudflare-for-platforms/workers-for-platforms/get-started/configuration.mdx

@@ -28,7 +28,7 @@ This guide will instruct you on setting up Workers for Platforms. You will confi
 
 ### 1. Create a user Worker
 
-First, create a [user Workers](/cloudflare-for-platforms/workers-for-platforms/reference/how-workers-for-platforms-works/#user-workers). User Workers are Workers that your end users (end developers) will be uploading.
+First, create a [user Worker](/cloudflare-for-platforms/workers-for-platforms/reference/how-workers-for-platforms-works/#user-workers). User Workers are Workers that your end users (end developers) will be uploading.
 
 User Workers can be created using C3. C3 (create-cloudflare-cli) is a command-line tool designed to help you setup and deploy Workers to Cloudflare as fast as possible.