Update README.md

Author: CodePearly

README.md

@@ -1,4 +1,4 @@
 # JavaGameStuff
-Download <a href="https://github.com/CodePearly/JavaGameStuff/releases/download/Tetris-v1.0/Tetris.jar">Snake.jar</a> if you want to run it.
+Download <a href="https://github.com/CodePearly/JavaGameStuff/releases/download/Tetris-v1.0/Tetris.jar">Tetris.jar</a> if you want to run it.
 
 But this is just the open sourced code for Tetris