Add license information

Davide Girardi · Davide Girardi · commit e6ba06780120 · 2025-04-17T09:14:40.000+02:00
diff --git a/src/sound/LICENCE.md b/src/sound/LICENCE.md
@@ -23,3 +23,4 @@ The following sound effects have been originally created by Element.
 - `end_call`
 - `reactions/rock`
 - `reactions/wave`
+- `reactions/baduntss`
