Fix macos job

Author: larryliu0820

.github/workflows/trunk.yml

@@ -57,7 +57,7 @@ jobs:
         # Debug
         which pip
         bash .ci/scripts/setup-conda.sh
-        PYTHON_EXECUTABLE=python ${CONDA_RUN} bash ./install_executorch.sh --editable --pybind xnnpack --use-pt-pinned-commit
+        PYTHON_EXECUTABLE=python ${CONDA_RUN} bash ./install_executorch.sh --editable --pybind xnnpack
         # Try to import extension library
         python -c "from executorch.extension.llm.custom_ops import custom_ops"