Fix wrong path to plain license

Author: carlbennett

src/views/LegalPlain.php

@@ -18,7 +18,7 @@ public function render(Model &$model) {
     if (!$model instanceof LegalModel) {
       throw new IncorrectModelException();
     }
-    echo file_get_contents("../LICENSE");
+    echo $model->license;
   }
 
 }