chore(deps): update alchemist to v43.0.20 (patch) #2251

Job	Run time
check-simulations-multiplatform (windows-2025)	4m 31s
check-simulations-multiplatform (ubuntu-24.04)	3m 16s
check-simulations-multiplatform (macos-15)	2m 24s
build-image	3m 5s
success	3s
	13m 19s

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