Pandas CI use ubuntu 22.04

xref https://github.com/pandas-dev/pandas/pull/50113#issuecomment-1341589258

Currently 20.04 is pinned to fix CI

Comment From: phofl

I'd propose using 22.04, this has longer support than 22.10

Comment From: MarcoGorelli

Sounds good

Comment From: MarcoGorelli

closed in https://github.com/pandas-dev/pandas/pull/50117