fix conda

Author: cccclai

.github/workflows/trunk.yml

@@ -827,7 +827,11 @@ jobs:
         # The generic Linux job chooses to use base env, not the one setup by the image
         CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
         conda activate "${CONDA_ENV}"
+
         # Install executorch
+        echo "::group::Set up ExecuTorch"
+        bash .ci/scripts/setup-conda.sh
+        eval "$(conda shell.bash hook)"
         ${CONDA_RUN} python install_executorch.py
 
         echo "::endgroup::"