chore: typo (#2250)

Author: situ2001

packages/create-app/README.md

@@ -2,7 +2,7 @@
 
 [![NPM version](https://img.shields.io/npm/v/create-slidev?color=3AB9D4&label=)](https://www.npmjs.com/package/create-slidev)
 
-Starter template generater for [Slidev](https://sli.dev).
+Starter template generator for [Slidev](https://sli.dev).
 
 ## Usage