Bump actions/checkout from 3.6.0 to 4.0.0 #130

Job	Run time
Pre-commit checks / Pre-commit Checks	17s
Unit tests (macOS-Xcode, 3.8)	3m 2s
Unit tests (macOS-Xcode, 3.9)	3m 4s
Unit tests (macOS-Xcode, 3.10)	2m 53s
Unit tests (macOS-Xcode, 3.11)	2m 54s
Unit tests (macOS-app, 3.8)	2m 46s
Unit tests (macOS-app, 3.9)	3m 59s
Unit tests (macOS-app, 3.10)	4m 58s
Unit tests (macOS-app, 3.11)	2m 25s
Unit tests (linux-flatpak, 3.8)	6m 46s
Unit tests (linux-flatpak, 3.9)	8m 21s
Unit tests (linux-flatpak, 3.10)	6m 47s
Unit tests (linux-flatpak, 3.11)	7m 9s
Unit tests (windows-VisualStudio, 3.8)	4m 11s
Unit tests (windows-VisualStudio, 3.9)	3m 59s
Unit tests (windows-VisualStudio, 3.10)	4m 1s
Unit tests (windows-VisualStudio, 3.11)	5m 6s
Unit tests (windows-app, 3.8)	3m 35s
Unit tests (windows-app, 3.9)	3m 40s
Unit tests (windows-app, 3.10)	4m 9s
Unit tests (windows-app, 3.11)	3m 51s
Unit tests (iOS, 3.8)	5m 22s
Unit tests (iOS, 3.9)	4m 58s
Unit tests (iOS, 3.10)	5m 9s
Unit tests (android, 3.8)	12m 39s
Unit tests (android, 3.9)	10m 47s
Unit tests (android, 3.10)	9m 52s
Unit tests (linux-system, system, ubuntu-latest, sudo apt-get update -y && sudo apt-get install -...	3m 32s
	2h 20m 12s

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