This looks like an ad for only Raycast which does not appear to be affiliated with Microsoft or GitHub at all so blaming Copilot or GitHub here is not justified.

Edit: The link in the promotion goes to https://docs.github.com/en/copilot/how-tos/use-copilot-agent...

Which does show that this is affiliated with GitHub unlike what I thought. There are no mentions of this string in a code repository on GitHub (including the Raycast copilot extention).