Update index.html

index.html

@@ -151,7 +151,7 @@
         const cannonSound = new Audio('firemn.ogg');
         const machinegunSound = new Audio('firemg.ogg');
         const enemyFireSound = new Audio('fireenemy.ogg');
-        const bgm = new Audio('BGM.ogg');
+        const bgm = new Audio('BGM2.ogg');
         const countSound = new Audio('count.ogg');
         const deathSound = new Audio('death.ogg');
         bgm.loop = true;