The other thing that would help, is for that to be lost among your good reviews. It stands out because it's the only review you have.

Devise a campaign where you actively ask your satisfied customers to leave you feedback on there. Most people don't leave reviews, but some do if you ask them to.

Also, add something to your process so that you ask for those reviews after every job. It can be a line on your invoice, a buck slip you send with the invoice, or even a follow-up email you do a week after a completed job. Thank them for being a customer and ask them if they were happy with your work, would they consider leaving you feedback. Give them a link to do it right in the email.

You can still go back and ask existing customers