✅(e2e) reduce e2e flakiness

We identified some tests causing flakiness
in the e2e tests.

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

@@ -85,7 +85,7 @@ test.describe('Doc Export', () => {
     page,
     browserName,
   }) => {
-    test.slow();
+    test.setTimeout(60000);
 
     const [randomDoc] = await createDoc(page, 'doc-editor', browserName, 1);
     let body = '';

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

@@ -216,6 +216,8 @@ test.describe('Document list members', () => {
       page.getByText('The member has been removed from the document').first(),
     ).toBeVisible();
 
-    await expect(page.getByText('Share')).toBeHidden();
+    await expect(
+      page.getByRole('heading', { name: 'Share', level: 3 }),
+    ).toBeHidden();
   });
 });