证书接口调整

@@ -669,7 +669,7 @@ class User extends Api
 
         
         $file_path = "$id.png";
-        $image = \think\Image::open(ROOT_PATH."public/uploads/yuan.png");
+        $image = \think\Image::open(ROOT_PATH."public/assets/img/yuan.png");
         $path_ttf = ROOT_PATH.'public/assets/fonts/PingFang.ttf';
         $year = date('Y');
         //证书编号