add missing quotes found by shellcheck

As title

Author: esc

.github/workflows/llvmlite_linux-64_conda_builder.yml

@@ -59,7 +59,7 @@ jobs:
           fi
           CONDA_CHANNEL_DIR="conda_channel_dir"
           mkdir $CONDA_CHANNEL_DIR
-          conda build --debug -c $LLVMDEV_CHANNEL -c defaults --python=${{ matrix.python-version }} conda-recipes/llvmlite --output-folder=$CONDA_CHANNEL_DIR --no-test
+          conda build --debug -c "$LLVMDEV_CHANNEL" -c defaults --python=${{ matrix.python-version }} conda-recipes/llvmlite --output-folder=$CONDA_CHANNEL_DIR --no-test
 
       - name: Upload llvmlite conda package
         uses: actions/upload-artifact@v4