chore: adjust user event setup

Author: ianlet

docs/qwik-testing-library/example.mdx

@@ -29,13 +29,14 @@ import {Counter} from './counter'
 describe('<Counter />', () => {
   // describe the test case
   it('should increment the counter', async () => {
+    // setup user event
+    const user = userEvent.setup()
     // render the component into the DOM
     await render(<Counter />)
 
     // retrieve the 'increment count' button
     const incrementBtn = screen.getByRole('button', {name: /increment count/})
     // click the button twice
-    const user = userEvent.setup()
     await user.click(incrementBtn)
     await user.click(incrementBtn)