chore: support torch2.8 wheels

scripts/build_linux_wheel_torch2.8.sh

@@ -22,7 +22,7 @@ docker run --rm \
     cd /nunchaku && \
     rm -rf build && \
     gcc --version && g++ --version && \
-    ${PYTHON_ROOT_PATH}/bin/pip install --pre --no-cache-dir torch==${TORCH_VERSION} torchvision==${TORCHVISION_VERSION} torchaudio==${TORCHAUDIO_VERSION} --index-url https://download.pytorch.org/whl/nightly/cu${CUDA_VERSION//.} && \
+    ${PYTHON_ROOT_PATH}/bin/pip install --pre --no-cache-dir torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu${CUDA_VERSION//.} && \
     ${PYTHON_ROOT_PATH}/bin/pip install build ninja wheel setuptools && \
     export NUNCHAKU_INSTALL_MODE=ALL && \
     export NUNCHAKU_BUILD_WHEELS=1 && \

scripts/build_windows_wheel_torch2.8.cmd

@@ -20,7 +20,7 @@ call conda activate %ENV_NAME%
 :: install dependencies
 call pip install ninja setuptools wheel build
 
-call pip install --pre torch==2.8 torchvision==0.23 torchaudio==2.8 --index-url https://download.pytorch.org/whl/nightly/cu128
+call pip install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu128
 
 :: set environment variables
 set NUNCHAKU_INSTALL_MODE=ALL