COMP: Fix typo in / detectable with ITK_FUTURE_LEGACY_REMOVE #1205

Job	Run time
python-build-workflow / build-linux-py (11, _2_28-x64)	29m 52s
cxx-build-workflow / build-test-cxx (ubuntu-22.04)	31m 18s
python-build-workflow / build-linux-py (11, 2014-x64)	28m 45s
cxx-build-workflow / build-test-cxx (windows-2022)	32m 31s
python-build-workflow / build-linux-py (11, _2_28-aarch64)	6h 0m 13s
cxx-build-workflow / build-test-cxx (macos-13)	26m 55s
cxx-build-workflow / build-test-cxx (macos-14)	19m 36s
python-build-workflow / build-macos-arm-py (11)	29m 56s
python-build-workflow / build-windows-python-packages (11)	47m 8s
python-build-workflow / test-linux-notebooks	0s
python-build-workflow / publish-python-packages-to-pypi	0s
	10h 6m 14s

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