Add missing json parse statement to load data (sorry, totally forgot)

layouts/shortcodes/random_image.html

@@ -10,7 +10,7 @@
 <script>
 document.addEventListener("DOMContentLoaded", function() {
   const container = document.getElementById("{{ $id }}");
-  const choices = {{ $choices }};
+  const choices = JSON.parse(`{{ $choices }}`);
   if (!container || !choices) { return; }
   const img = document.createElement("img");
   img.alt = "{{ $alt }}";