Correct private documentation path in private.md

Updated the path for private documentation location.

Author: jaysa68

docs/staff-docs/private.md

@@ -3,7 +3,7 @@ title: Private Docs
 ---
 
 Additional documentation not published publicly can be found at
-`~staff/privdocs` on supernova.
+`~staff` on supernova.
 
 Generally, staff documentation should be placed on this website whenever
 possible. However, sometimes there are things which should be documented, but