Addition of ghost spawn 4 on map

src/main/java/pacmanGame/Map.java

@@ -56,6 +56,7 @@ public class Map {
 	    this.put("1", "empty");
 	    this.put("2", "empty");
 	    this.put("3", "empty");
+	    this.put("4", "empty");
 	}};
 	public GameManager gameManager;