fix(editor): slash menu e2e (#11289)

tests/blocksuite/e2e/slash-menu.spec.ts

@@ -40,7 +40,7 @@ function formatWithTimezone(date: Date, timeZone: string = 'Asia/Tokyo') {
   const tokyoDate = date.toLocaleString('en-US', { timeZone });
   const year = tokyoDate.split(',')[0].split('/')[2];
   const month = tokyoDate.split(',')[0].split('/')[0].padStart(2, '0');
-  const day = tokyoDate.split(',')[0].split('/')[1];
+  const day = tokyoDate.split(',')[0].split('/')[1].padStart(2, '0');
   return `${year}-${month}-${day}`;
 }