Update data.json

Author: MaterArc

features/bitmap-default/data.json

@@ -2,7 +2,7 @@
   "title": "Default to Bitmap",
   "description": "Sets the default mode to bitmap in the costume editor.",
   "credits": [
-    { "username": "Medians", "url": "https://scratch.mit.edu/users/Medians/" },
+    { "username": "medians", "url": "https://scratch.mit.edu/users/medians/" },
     { "username": "MaterArc", "url": "https://scratch.mit.edu/users/MaterArc/" }
   ],
   "type": ["Editor"],