fix CI

Author: nychiang

.github/workflows/test_hiopbbpy.yml

@@ -21,10 +21,13 @@ jobs:
           auto-activate-base: true
           channels: conda-forge
 
-      - name: Install IPOPT and HiOpBBPy
+      - name: Install IPOPT via conda
         run: |
           conda install -c conda-forge cyipopt
           export LD_LIBRARY_PATH=$CONDA_PREFIX/lib:$LD_LIBRARY_PATH
+
+      - name: Install HiOpBBPy
+        run: |
           python -m pip install --upgrade pip
           pip install .