DEV: Print the error class in uploads:list_posts_with_broken_images.

lib/tasks/uploads.rake

@@ -764,7 +764,7 @@ def list_broken_posts(recover_from_s3: false)
         end
       end
     rescue => e
-      puts "#{post.full_url} Error: #{e.message}"
+      puts "#{post.full_url} Error: #{e.class}: #{e.message}"
     end
   end
 end