Use folder name for media admin

slices/admin/templates/photos/index.html.slim

@@ -11,7 +11,7 @@ div class="mb-4 max-w-prose mx-auto prose dark:prose-invert"
     code id="result"
   - photos_buckets.each do |year, photos|
     - next unless photos.count > 0
-    h2 = Date.parse(year).strftime("%m %b %Y")
+    h2 = year
     div class="grid grid-cols-3 gap-4"
       - photos.each do |photo|
         - next if photo.match(/small/)