[BUG] cant compile the cuda

[huynhducloi00]

build_pytorch/pytorch/.venv/lib/python3.12/site-packages/bitnet-1.1-py3.12-linux-x86_64.egg/gemm_lowbit_ext.cpython-312-x86_64-linux-gnu.so: undefined symbol: _ZNK2at10TensorBase8data_ptrI6__halfEEPT_v

have anyone seen that issue i just try to run the example/kernel_test.py

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[Dayun0925]

change the code "typedef half fp8" in gemm_lowbit_kernel.cu into "typedef at::Half fp8"