PHP 8.1 compatibility

Related merge requests:

• storm!39 (merged)
• zf!7 (merged)
• https://git.afi-sa.net/afi/negative/-/merge_requests/31
• matomo-php-tracker!1 (merged)

application/modules/admin/controllers/CmsController.php

@@ -182,7 +182,7 @@ class Admin_CmsController extends ZendAfi_Controller_Action {
     $script[] = 'var treeViewSelectedLibrary = '
       . $bib_selected . ';';
 
-    $this->view->headScript()->appendScript(implode($script,"\n"));
+    $this->view->headScript()->appendScript(implode("\n", $script));
 
   }