haha literally why is it a pancake

Yes

my guess: their new-ish "PR stacks" feature?

I would also love to know

Looks like an easter egg for Stacked Pull Requests.

https://gh.io/stacks

so cute

Apparently it is meant as an easter egg/announcement of the new stacked pull requests feature (https://docs.github.com/en/pull-requests/how-tos/stacked-pul...), but with GitHub's gradual quality degradation and nothing denoting that in the tooltip it just looks like their icon font is malfunctioning.

hungry for pancakes now