BlogPosts: Fix inaccurate stretching of image previews

src/lib/BlogPost.svelte

@@ -4,6 +4,6 @@
 	export let url;
 </script>
 <a href={url} target="_blank"><div class="bg-neutral-700 hover:bg-neutral-500 p-2 rounded-md">
-	<img class="w-76 h-44 object-fit" src={image}>
+	<img class="w-full aspect-[40/21]" src={image}>
 	<h2 class="text-sm font-bold">{title}</h2>
 </div></a>