✅(frontend) fix flaky e2e on duplicate test

Fix a flaky issue in the e2e test for
duplicating a document.

Author: AntoLC

src/frontend/apps/e2e/__tests__/app-impress/doc-header.spec.ts

@@ -582,8 +582,12 @@ test.describe('Doc Header', () => {
     await child.hover();
     await child.getByText(`more_horiz`).click();
 
+    const currentUrl = page.url();
+
     await page.getByRole('menuitem', { name: 'Duplicate' }).click();
 
+    await expect(page).not.toHaveURL(new RegExp(currentUrl));
+
     await verifyDocName(page, duplicateTitle);
 
     await expect(