made staneks gift work with prestiges

src/SourceFile/SourceFiles.tsx

@@ -205,6 +205,6 @@ SourceFiles["SourceFile12"] = new SourceFile(
   <>This Source-File lets the player start with Neuroflux Governor equal to the level of this Source-File.</>,
 );
 SourceFiles["SourceFile13"] = new SourceFile(
-  12,
+  13,
   <>Each level of this Source-File increases the size of Stanek's Gift.</>,
 );