Update pandoc_preserve_img.lua

Author: suhang12332

.github/scripts/pandoc_preserve_img.lua

@@ -1,13 +1,15 @@
 -- 将 Pandoc AST 中的图片节点转换为原始 HTML <img>，保留宽高等属性
 
 function Image(el)
-  -- el.src, el.title, el.caption, el.attr
+  -- el.src, el.title, el.caption, el.attributes
   local src = el.src or (el.target and el.target[1]) or ""
   local alt = pandoc.utils.stringify(el.caption or {})
 
   local attrs = {}
-  if el.attr and el.attr.attributes then
-    for k, v in pairs(el.attr.attributes) do
+
+  -- 直接从 attributes 中取出 width/height 等所有原始属性
+  if el.attributes then
+    for k, v in pairs(el.attributes) do
       table.insert(attrs, string.format('%s="%s"', k, v))
     end
   end