seedminer: clarify private folder

people are still getting confused

_pages/en_US/seedminer.txt

@@ -21,6 +21,7 @@ This method uses a powerful graphics card to perform the calculations needed. A
 1. Copy the 32 character long name of the folder you see inside Nintendo 3DS
   + Do not go inside any more folders
   + If you see multiple 32 character long folders, follow [these instructions](troubleshooting#multiple-long-folder-names-in-nintendo-3ds-folder)
+  + You can ignore the `private` folder if you have it
 
 	![]({{ "/images/screenshots/id0-example.png" | absolute_url }})
 	{: .notice--info}