Update lavalink/player.py

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

lavalink/player.py

@@ -136,7 +136,7 @@ async def on_voice_state_update(self, data: dict) -> None:
             if channel != self.channel:
                 if self.channel:
                     self._last_channel_id = self.channel.id
-                elif channel is None:
+                if channel is None:
                     self._session_id = None
                     self._pending_server_update = None
                     ws_rll_log.verbose(