Upgrade checkout Github action (v3->v4) #202

Job	Run time
build (fedora:latest, true)	1m 5s
build (quay.io/centos/centos:stream8, true)	1m 31s
build (quay.io/centos/centos:stream9, true)	1m 54s
build (debian:testing, true)	3m 3s
build (debian:latest, true)	2m 35s
build (ubuntu:latest, true)	1m 47s
build (ubuntu:rolling, true)	2m 40s
build (ubuntu:lunar, true)	2m 58s
build (ubuntu:jammy, true)	2m 15s
build (ubuntu:focal, true)	2m 4s
build (quay.io/fedora/fedora:rawhide, false)	43s
build (ubuntu:devel, false)	2m 59s
	25m 34s

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