adjust library name and wording in NOTICE

NOTICE

@@ -1,7 +1,7 @@
-Linux Projected Filesystem
+Linux projected filesystem library
 Copyright (C) 2018-2019 GitHub, Inc.
 
-This library contains code derived from other open source projects.
+This project contains code from other open source projects.
 You can find the source code of these projects along with their
 license information below.