Update src/content/docs/workers/tutorials/build-a-content-version-system/index.mdx

Co-authored-by: db-cloudflare <[email protected]>

Author: shinchan79

src/content/docs/workers/tutorials/build-a-content-version-system/index.mdx

@@ -40,7 +40,7 @@ To complete this tutorial, you only neeed:
 
 If you have not already installed needed tools, you can follow the instructions in the part 0. Install tools below.
 
-## 0. Install tools.
+## 1. Set up Worker project and Durable Objects
 
 ### Install Node.js
 Node.js [official website](https://nodejs.org/en/download/package-manager)