Fix end-of-file crackle on sound effects (#111)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: jasonvarga

resources/audio/buddy-in.mp3

@@ -1,7 +1,7 @@
 import { watch } from 'vue';
 import { debounce } from '@statamic/cms';
-import buddyIn from '../audio/buddy-in.mp3'
-import buddyOut from '../audio/buddy-out.mp3'
+import buddyIn from '../audio/buddy-in.wav'
+import buddyOut from '../audio/buddy-out.wav'
 import { useCollaborationStore } from './store';
 
 export default class Workspace {