Update domains/killerf.json

Co-authored-by: CuteDog5695 <cutedog5695@gmail.com>

domains/killerf.json

@@ -2,7 +2,7 @@
   "description": "The Person Who Hacked QLASH RP And got away with it with nothing to lose, An Exploiter to say the least; Welcome to the other side",
   "repo": "https://guns.lol/killerf",
   "owner": {
-    "username": "GS KillerF",
+    "username": "MohamexDR",
     "email": "loliehentaixd@gmail.com"
   },
   "record": {