gmx: fix include directive #4922

Job	Run time
Build source distribution	19s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	5m 38s
Build wheels for cp311-manylinux_x86_64	5m 39s
Build wheels for cp311-macosx_x86_64	5m 23s
Build wheels for cp311-macosx_arm64	3m 36s
Build wheels for cp311-win_amd64	6m 21s
Build wheels for cp310-manylinux_aarch64	4m 11s
build_pypi_index	11s
build_docker (12)	3m 46s
build_docker (_cu11, 11)	4m 6s
upload_pypi	0s
deploy_pypi_index	0s
Pass testing build wheels	3s
	39m 14s

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