fix(ui): update PageHead test to match current component behavior

Agent-Logs-Url: https://github.com/deytenit/ermnvldmr.com/sessions/a06f65c8-6fb7-43e9-82ba-0c00477c05aa

Co-authored-by: deytenit <60275123+deytenit@users.noreply.github.com>

packages/ui/src/components/Page/PageHead/PageHead.test.tsx

@@ -32,7 +32,7 @@ describe('PageHead', () => {
   it('applies the correct classes for the strategy', () => {
     render(<PageHead heading="Test" strategy="always-collapsed-fixed" />);
     const header = screen.getByRole('banner');
-    expect(header).toHaveClass('sticky');
-    expect(header).toHaveClass('shadow-md');
+    expect(header).toHaveClass('fixed');
+    expect(header).not.toHaveClass('sticky');
   });
 });