message: [tests] update router reset wait time
diff: @@ -82,13 +82,13 @@ sudo "${OT_CTL}" state | grep "disabled"
  sudo killall otbr-agent
  sleep 10
  sudo "${OTBR_AGENT}" -I wpan0 -v -d 6 "spinel+hdlc+forkpty://${OT_RCP}?forkpty-arg=1" --auto-attach=1 &
  -sleep 10
  +sleep 40
  sudo "${OT_CTL}" state | grep "leader"
  sudo killall otbr-agent
  sleep 10
  sudo "${OTBR_AGENT}" -I wpan0 -v -d 6 "spinel+hdlc+forkpty://${OT_RCP}?forkpty-arg=1" --auto-attach &
  -sleep 10
  +sleep 40
  sudo "${OT_CTL}" state | grep "leader"
  sudo "${OT_CTL}" reset
  sleep 1
  