cli: fix plugin template by using renderInTestApp in component test

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/cli/templates/default-plugin/src/components/ExampleComponent/ExampleComponent.test.tsx.hbs

@@ -1,11 +1,10 @@
 import React from 'react';
-import { render } from '@testing-library/react';
 import { ExampleComponent } from './ExampleComponent';
 import { ThemeProvider } from '@material-ui/core';
 import { lightTheme } from '@backstage/theme';
 import { rest } from 'msw';
 import { setupServer } from 'msw/node';
-import { msw } from '@backstage/test-utils';
+import { msw, renderInTestApp } from '@backstage/test-utils';
 
 describe('ExampleComponent', () => {
   const server = setupServer();
@@ -19,8 +18,8 @@ describe('ExampleComponent', () => {
     );
   });
 
-  it('should render', () => {
-    const rendered = render(
+  it('should render', async () => {
+    const rendered = await renderInTestApp(
       <ThemeProvider theme={lightTheme}>
         <ExampleComponent />
       </ThemeProvider>,