chore(deps): update alchemist to v43.0.21 (#895) #2256

Job	Run time
check-simulations-multiplatform (ubuntu-24.04)	2m 50s
check-simulations-multiplatform (windows-2025)	4m 29s
check-simulations-multiplatform (macos-15)	2m 44s
build-image	3m 20s
success	2s
	13m 25s

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