Migrate from Jest to Vitest (#34454)

app/javascript/mastodon/features/ui/components/__tests__/column-test.jsx

@@ -7,7 +7,7 @@ const fakeIcon = () => <span />;
 describe('<Column />', () => {
   describe('<ColumnHeader /> click handler', () => {
     it('runs the scroll animation if the column contains scrollable content', () => {
-      const scrollToMock = jest.fn();
+      const scrollToMock = vi.fn();
       const { container } = render(
         <Column heading='notifications' icon='notifications' iconComponent={fakeIcon}>
           <div className='scrollable' />