Logo for site action

[corentinmorice1]

I have a website with an action (a link at the top of the webpage, like the "Learn More" button in the template). I would like to replace the text on this action with a logo. Is that possible? I tried

actions:
    - title: My Link
      url: https://www.my-link.com
      logo: my-logo.jpg

with no success.