REST API - adding hyperlink when creating a ticket

I am trying to add a hyperlink to ticket description but it adds it as a plain text.

{

      "key": "description",

      "value": "New Hire: Kim Lane2 \n\n Target Start Date changed to: \n\nPDF Link: https://www.google.com"

    },

I tried using link key but not sure where it adds the link:

{

      "key": "link",

      "value": "https://www.google.com"

    }