附件上传的格式修改

文件路径：

（windows）D:\wpwiki\apache2\htdocs\wiki\wp-content\plugins\UEditor-KityFormula\ueditor\php\config.json

（linux）/opt/wpwiki/apache2/htdocs/wiki/wp-content/plugins\UEditor-KityFormula\ueditor\php\config.json