While it's possible to include additional contact information in the meeting description using personalization tokens (see screenshot below), it's unfortunately not possible to add a link to a contact record in HubSpot.
Links to contact records don't exist as contact properties/tokens in HubSpot and meeting descriptions currently don't support hyperlinks. I found a feature request in our Ideas forum where other customers are requesting additional formatting options in meeting descriptions. I'd be great if you could support this idea with an upvote or a comment. Our product team uses that forum to collect ideas on how we can improve the product for our customers and they pay particular attention to the top voted ideas. Thank you!