Add Circle Linux logo.
The logo is available under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License as stated here: https://github.com/circle-linux/branding/blob/main/README.md
The logo is available under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License as stated here: https://github.com/circle-linux/branding/blob/main/README.md