ci: extended the timeout for one slow playwright test which failed on GH after 50000ms, see /actions/runs/31088126420/job/92572380990#step:9:186

Author: geoffroy-noel-ddh

frontend/tests/routes.spec.js

@@ -45,6 +45,11 @@ test.describe('routes', () => {
     });
 
     test('bibliography detail page shows all entries for inscriptions with multiple citations', async ({ page }) => {
+        // triple the deplay. 
+        // This test failed due to a 50000ms timeout on GH job, 
+        // not sure why this page and why it started occurring.
+        test.slow(); 
+
         // R46KDTZX = L'année épigraphique; ISic003326 cites it twice: 1952.0158 and 1996.0796
         await page.goto(`${BASE}/bibliography/R46KDTZX`);
         await expect(page.locator('h1')).toBeVisible();