Upgrade to Twig 3.0 (required for php8.4 support)

src/Twig/OrganisationsExtension.php

@@ -77,7 +77,7 @@ class OrganisationsExtension extends AbstractExtension implements GlobalsInterfa
         ];
     }
 
-    public function getGlobals()
+    public function getGlobals(): array
     {
         $config = $this->services->config['organisation'];