[BugFix] Fix `to` in MultiDiscreteTensorSpec #10344

Job	Run time
build-wheel-linux (3.8, cp38-cp38, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 34s
build-wheel-windows (3.8, 3.8)	2m 21s
build-wheel-linux (3.9, cp39-cp39, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 38s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 36s
build-wheel-windows (3.9, 3.9)	2m 7s
build-wheel-windows (3.10, 3.10.3)	3m 40s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 37s
build-wheel-windows (3.11, 3.11)	4m 16s
test-wheel (linux, ubuntu-20.04, 3.8)	2m 4s
test-wheel (linux, ubuntu-20.04, 3.9)	2m 33s
test-wheel (linux, ubuntu-20.04, 3.10)	2m 14s
test-wheel (linux, ubuntu-20.04, 3.11)	2m 3s
test-wheel-windows (3.8)	4m 37s
test-wheel-windows (3.9)	4m 37s
test-wheel-windows (3.10)	4m 43s
test-wheel-windows (3.11)	4m 50s
	46m 30s

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