Bump actions/setup-python from 4 to 5 (#256) #1453

Job	Run time
Examples Conda Py3	1m 25s
Flake8	16s
Documentation	1m 47s
Tests for downstream project meshmode	10m 49s
Tests for downstream project grudge	8m 49s
Mypy	1m 57s
Pylint	2m 19s
Pytest Conda Py3 Intel	2m 19s
Tests for downstream project mirgecom	3s
Tests for downstream project mirgecom_examples	4s
Pytest Conda Py3 POCL	2m 18s
	32m 6s

Provide feedback