Bump @types/node from 20.12.5 to 20.12.6 #259

Job	Run time
test-fails-on-error	10s
test-generate	4s
test (ubuntu-latest, nightly)	4m 0s
test (ubuntu-latest, lts)	4m 14s
test (ubuntu-latest, lts-22.7, 9.6.4)	3m 37s
test (ubuntu-latest, lts-12.26, 8.4.4)	2m 37s
test (macOS-latest, nightly)	11m 2s
test (macOS-latest, lts)	8m 50s
test (macOS-latest, lts-22.7, 9.6.4)	5m 40s
test (macOS-latest, lts-12.26, 8.4.4)	3m 50s
test (windows-latest, nightly)	3m 3s
test (windows-latest, lts)	3m 5s
test (windows-latest, lts-22.7, 9.6.4)	5m 35s
test (windows-latest, lts-12.26, 8.4.4)	1m 50s
test-stack-yamls (stack-nightly.yaml)	3m 54s
test-stack-yamls (stack.yaml)	2m 37s
	1h 4m 8s

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