[chrismorgan]

In their title, they use the character U+26FA TENT, which could be depicted as any kind of tent. In the body, GitHub replaces emoji with images for some reason, in this case a particularly weird thing that isn’t even obviously a tent. (I presume this is what you’re remarking on.)

The screenshot shows what I presume is actually the logo, which is a tipi.

[croes]

Do you see something different than I do? I see a typical orange two-man tent

[ptato]

Every browser / os can have different emoji fonts

Emojipedia article for "Tent": https://emojipedia.org/tent/