Updated Interface to 50001 for MoP Beta 5.0.1

diff --git a/KillTrack.toc b/KillTrack.toc
index 98e411d..4ad14fc 100644
--- a/KillTrack.toc
+++ b/KillTrack.toc
@@ -1,4 +1,4 @@
-## Interface: 40300
+## Interface: 50001
 ## Version: @project-version@
 ## Title: KillTrack
 ## Notes: Keeps track of how many kills you have per mob and displays them in a list.