Shortened sidebar title to Vercel sync env vars

docs/guides/examples/vercel-sync-env-vars.mdx

@@ -1,15 +1,11 @@
 ---
 title: "Syncing environment variables from your Vercel projects"
-sidebarTitle: "Vercel sync environment variables"
+sidebarTitle: "Vercel sync env vars"
 description: "This example demonstrates how to sync environment variables from your Vercel project to Trigger.dev."
 ---
 
 import VercelDocsCards from "/snippets/vercel-docs-cards.mdx";
 
-## Overview
-
-This example shows how to automatically sync environment variables from your Vercel project to Trigger.dev.
-
 ## Build configuration
 
 To sync environment variables, you just need to add our build extension to your `trigger.config.ts` file. This extension will then automatically run every time you deploy your Trigger.dev project.