chore(jt808): fix typos

apps/emqx_gateway_jt808/src/emqx_jt808_channel.erl

@@ -238,7 +238,7 @@ handle_in(Frame = ?MSG(MType), Channel) when
     ?SLOG(debug, #{msg => "recv_frame", frame => Frame, info => "jt808_client_deregister"}),
     do_handle_in(Frame, Channel#channel{conn_state = disconnected});
 handle_in(Frame, Channel) ->
-    ?SLOG(error, #{msg => "unexpected_lwm2m_frame", frame => Frame}),
+    ?SLOG(error, #{msg => "unexpected_jt808_frame", frame => Frame}),
     {shutdown, unexpected_frame, Channel}.
 
 handle_frame_error(Reason, Channel) ->