Update index.blade.php

在新的页面打开下载链接，在当前页面打开下载链接，chrome浏览器会出现卡顿的情况

Author: kevin1018

resources/views/index.blade.php

@@ -119,7 +119,7 @@
                             <!-- Emphasis label -->
 
                             <div class="tools">
-                                <a href="{{ route('backup-download', ['disk' => $backup[1], 'file' => $backup[0].'/'.$file]) }}"><i class="fa fa-download"></i></a>
+                                <a target="_blank" href="{{ route('backup-download', ['disk' => $backup[1], 'file' => $backup[0].'/'.$file]) }}"><i class="fa fa-download"></i></a>
                                 <a href="{{ route('backup-delete', ['disk' => $backup[1], 'file' => $backup[0].'/'.$file]) }}" class="backup-delete"><i class="fa fa-trash-o"></i></a>
                             </div>
                         </li>
@@ -146,4 +146,4 @@
         <pre class="output-body"></pre>
     </div>
     <!-- /.box-body -->
-</div>
+</div>