Fix debug platform inclusion for Windows #11976

Job	Run time
build_node (ubuntu-latest)	2m 6s
build_node (macos-latest)	2m 38s
lint_node	33s
Ruby 3.1 on ubuntu-latest	12m 33s
Ruby 3.2 on ubuntu-latest	10m 41s
Ruby 3.3 on ubuntu-latest	9m 25s
build_node (windows-latest)	9m 13s
lint_ruby	22s
Ruby 3.1 on macos-latest	8m 29s
Ruby 3.2 on macos-latest	7m 12s
spelling	13s
Ruby 3.3 on macos-latest	6m 34s
Verify Jekyll website builds	6s
Ruby 3.1 on windows-latest	21m 13s
Ruby 3.2 on windows-latest	19m 33s
Ruby 3.3 on windows-latest	21m 55s
	2h 12m 46s

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