Update credits (sy567 -> hanubeki) per the description of hanubeki-modified-sm-ssc

Docs/credits.txt

@@ -84,7 +84,7 @@ v1toko
 Macgravel
  * Orbular noteskin (the default kb7 noteskin)
 
-sy567
+hanubeki (@803832, formerly sy567)
  * Small beginner helper fix
  (http://www.stepmania.com/forums/showpost.php?p=158721&postcount=12)
 

Themes/_fallback/BGAnimations/ScreenCredits overlay.lua

@@ -59,7 +59,7 @@ local contrib = {
 	"Petriform", -- default theme music
 	"桜為小鳩/Sakurana-Kobato (@sakuraponila)", -- custom scoring fixes
 	"Samuel Kim (1a2a3a2a1a)", -- various beat mode fixes
-	"sy567", -- beginner helper fix
+	"hanubeki (@803832)", -- beginner helper fix, among various other things
 	"v1toko", -- x-mode from StepNXA
 }
 

Themes/default/BGAnimations/ScreenCredits overlay.lua

@@ -59,7 +59,7 @@ local contrib = {
 	"Petriform", -- default theme music
 	"桜為小鳩/Sakurana-Kobato (@sakuraponila)", -- custom scoring fixes
 	"Samuel Kim (1a2a3a2a1a)", -- various beat mode fixes
-	"sy567", -- beginner helper fix
+	"hanubeki (@803832)", -- beginner helper fix, among various other things
 	"v1toko", -- x-mode from StepNXA
 }