Update THANKS.md

THANKS.md

@@ -1,10 +1,11 @@
-GRUB2-filemanager would not be what it is today without the invaluable help of
+g2fm (GRUB2-filemanager) would not be what it is today without the invaluable help of
 everybody who was kind enough to spend time testing it and reporting
 bugs.
 
-GRUB2-filemanager is based on the following open source projects:
+g2fm (GRUB2-filemanager) is based on the following open source projects:
 
 [a1ive's GRUB2](https://github.com/a1ive/grub)
+[a1ive's GRUB2 file manager](https://github.com/a1ive/grub2-filemanager)
 [GRUB4DOS](https://github.com/chenall/grub4dos)
 [memdisk](https://wiki.syslinux.org/wiki/index.php?title=MEMDISK)
 [ImDisk](http://www.ltr-data.se/opencode.html/#ImDisk)