Maybe it's changed now, but the "π" in the title is unicode U+03C0 [0], which is a lowercase pi. In the font Verdana (the one that I see in the title, but not this comment as I type it[1]), U+03C0 looks like a small capital pi and looks a bit like "n").[2]

[0] https://www.compart.com/en/unicode/U+03C0

[1] EDIT: once the comment was submitted, the font changed to Verdana.

[2] https://graphicdesign.stackexchange.com/questions/74608/why-...