ci(deps): update actions/checkout action to v4.3.0 #1984

Job	Run time
check-simulations-multiplatform (ubuntu-24.04)	2m 39s
check-simulations-multiplatform (windows-2025)	4m 5s
check-simulations-multiplatform (macos-14)	2m 32s
build-image	2m 53s
success	3s
	12m 12s

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