fix(metadata/index.liquid): corrects 403s in open graph images

config/filters/general.js

@@ -15,6 +15,8 @@ export default {
       ellipsis: "...",
     }),
   shuffleArray,
+  mergeArray: (a, b) =>
+  Array.isArray(a) && Array.isArray(b) ? [...new Set([...a, ...b])] : [],
   pluralize: (count, string, trailing) => {
     const countStr = String(count).replace(/,/g, "");
     if (parseInt(countStr, 10) === 1) return string;