Fix Variant Build (dmlc#11695)

Author: DEKHTIARJonathan

ops/pipeline/build-variant-wheels-impl.sh

@@ -16,9 +16,8 @@ source activate wheelnext
 # Cannot set -u before Conda env activation
 set -xu
 
-python -m pip install -v \
-  git+https://github.com/wheelnext/pep_xxx_wheel_variants.git@25ea4b6d0060d2263d8ec674dd96feffbae78081#subdirectory=pep_xxx_wheel_variants
-python -m pip install "nvidia-variant-provider @ git+https://github.com/wheelnext/nvidia-variant-provider.git@efc215a95f211276587c8a63617dc6dca5f19363"
+python -m pip install "variantlib[cli] @ git+https://github.com/wheelnext/variantlib.git@main"
+python -m pip install "nvidia-variant-provider @ git+https://github.com/wheelnext/nvidia-variant-provider.git@master"
 variantlib make-variant --no-isolation -f python-package/dist/xgboost-*.whl \
   -p "nvidia :: cuda_version_lower_bound :: 12.0" \
   -p "nvidia :: cuda_version_upper_bound :: 12.9" \