doc: remove unsupported template type from v8.md

Signed-off-by: Renegade334 <contact.9a5d6388@renegade334.me.uk>
PR-URL: #63410
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Renegade334

doc/api/v8.md

@@ -385,7 +385,7 @@ changes:
   * `format` {string} If it's `'count'`, the count of matched objects
     is returned. If it's `'summary'`, an array with summary strings
     of the matched objects is returned.
-* Returns: {number|Array<string>}
+* Returns: {number|string\[]}
 
 This is similar to the [`queryObjects()` console API][] provided by the
 Chromium DevTools console. It can be used to search for objects that