docs: Enable local JavaScript libraries usage

Loading Libraries per default via CDN, e.g. GoogleFonts is possibly problematic with european GDPR.

Author: Steffeng5

docs/source/ADVANCED-CONFIGURATION.rst

@@ -85,7 +85,7 @@ Frontend Advanced Settings
 
  .. code-block:: php
 
- 'use.local.js.libs' => false,
+ 'use.local.js.libs' => true,
 
 **home.url**
  URL to redirect users after login.