Bump actions/checkout from 4 to 5 #1923

Job	Run time
Typos	7s
Ruff	7s
Documentation	1m 57s
Pytest Conda Py3 Intel	2m 18s
Pytest Conda Py3 POCL	2m 24s
Tests for downstream project grudge	10m 23s
Tests for downstream project meshmode	11m 27s
Tests for downstream project mirgecom_examples	4s
Tests for downstream project mirgecom	5s
Examples Conda Py3	1m 36s
basedpyright	1m 52s
	32m 20s

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