free the nonce buffer and the secret buffer after disconnecting

Author: TTtie

lib/voice/VoiceConnection.js

@@ -538,6 +538,10 @@ class VoiceConnection extends EventEmitter {
             this.sessionID = null;
             this.token = null;
             this.wsSequence = -1;
+            this.secret?.free();
+            this.#nonceBuffer?.free();
+            this.secret = null;
+            this.#nonceBuffer = null;
             this.#stablelib = null;
             this.updateVoiceState();
             /**