Add death sound effect to CREDITS

Author: csd4ni3l

CREDITS

@@ -1,7 +1,7 @@
 Thanks to OpenGameArt and:
     Kay Lousberg for the 2d Guns assets: https://opengameart.org/content/2d-guns
     2D_Platformerguy for the music: https://opengameart.org/content/electronic-music-chiptune-3
-
+    TinyWorlds for the death sound effect: https://opengameart.org/content/explosion-0
 Huge Thanks to Python for being the programming language used in this game.
 https://www.python.org/