Fix 'heebie-gbs-2014' game manifest

Author: avivace

entries/heebie-gbs-2014/game.json

@@ -2,7 +2,7 @@
     "files": [
         {
             "default": true,
-            "filename": "Heebie-GBs-2014.gb",
+            "filename": "Freebie-GBs-2019.gb",
             "playable": true
         }
     ],
@@ -16,4 +16,4 @@
     "slug": "heebie-gbs-2014",
     "title": "Heebie-GBs-2014",
     "typetag": "music"
-}
+}