Revert "chore(create-vite): use Type assertion in preact-ts (vitejs#8579)"

This reverts commit d1ba059.

Author: winderica

packages/create-vite/template-preact-ts/src/main.tsx

@@ -2,4 +2,4 @@ import { render } from 'preact'
 import { App } from './app'
 import './index.css'
 
-render(<App />, document.getElementById('app') as HTMLElement)
+render(<App />, document.getElementById('app')!)