fix: Array.at() non supporté par Node 14

src/shortcodes/gallery.js

@@ -32,10 +32,11 @@ const getLargestImage = (imageMetadata, format) => {
 
 const imgHtmlString = (image, imageMetadata) => {
   const largestUnoptimizedImg = getLargestImage(imageMetadata, "jpeg");
+  const imagePath = image.split('/')
 
   const imgAttributes = stringifyAttributes({
     src: largestUnoptimizedImg.url,
-    alt: image.split('/').at(-1),
+    alt: imagePath[imagePath.length-1],
     loading: 'lazy',
     decoding: 'async',
   });