minor #1299 [Site] Fix highlight.js version (smnandre)

This PR was merged into the 2.x branch.

Discussion
----------

[Site] Fix highlight.js version

We downgraded by accident the Highlight.js version

(made the translation page bug)

Commits
-------

8afb8fe [Site] Fix highlight.js version

Author: weaverryan

ux.symfony.com/importmap.php

@@ -110,10 +110,10 @@
         'version' => '3.59.1',
     ],
     'highlight.js/lib/core' => [
-        'version' => '10.3.0',
+        'version' => '11.7.0',
     ],
     'highlight.js/lib/languages/javascript' => [
-        'version' => '10.3.0',
+        'version' => '11.7.0',
     ],
     'intl-messageformat' => [
         'version' => '10.3.5',