feat(audio): aset suara final Kenney CC0 menggantikan placeholder (T-0.6)

internal/audio/assets/kenney-license.txt

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+	
+
+	Interface Sounds (1.0)
+
+	Created/distributed by Kenney (www.kenney.nl)
+	Creation date: 11-02-2020
+
+			------------------------------
+
+	License: (Creative Commons Zero, CC0)
+	http://creativecommons.org/publicdomain/zero/1.0/
+
+	This content is free to use in personal, educational and commercial projects.␍
+	Support us by crediting Kenney or www.kenney.nl (this is not mandatory)
+
+			------------------------------
+
+	Donate:   http://support.kenney.nl
+	Patreon:  http://patreon.com/kenney/
+
+	Follow on Twitter for updates:
+	http://twitter.com/KenneyNL