Bump actions/checkout from 3 to 4 (#32) #113

Job	Run time
Build and Test (debian-11, debug)	5m 59s
Build, Test and Deploy (latest, debug)	7m 36s
Build and Test (debian-11, release)	5m 18s
Build, Test and Deploy (latest, release)	6m 32s
Build and Test (debian-12, debug)	6m 44s
Build and Test (debian-12, release)	6m 4s
Build and Test (ubuntu-20.04, debug)	7m 0s
Build and Test (ubuntu-20.04, release)	5m 37s
Build and Test (ubuntu-22.04, debug)	6m 4s
Build and Test (ubuntu-22.04, release)	5m 15s
Email notification	2s
	1h 2m 11s

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