fix: 附件上传支持多选

package.json

 {
   "name": "panda-xform",
-  "version": "5.2.5",
-  "description": "5.2.5 未知原因出现antd上传组件图片显示异常",
+  "version": "5.2.6",
+  "description": "5.2.6 附件上传支持多选",
   "keywords": [
     "panda-xform"
   ],

src/core/widgets/file/FileUpload/index.js

@@ -278,6 +278,7 @@ const FileUpload = (props) => {
   return (
     <div className={styles.uploadBox}>
       <Upload
+        multiple
         accept={accepts[fileType]}
         fileList={showList}
         className="upload-list-inline"