How to print the text in system.output component in bold letter format?

Summary

I would like to style the text , label in oracle bot system component

Content

 printweeklyhours:
    component: "System.Output"
    properties:
      keepTurn: true
      text: "  ${recordHours} are recorded out of 40 hrs for this week."// need to print this bold letter
    transitions:
      next: "confirmTimeCard"