CI: check if GPU is allocated

Author: caic99

.github/workflows/cuda.yml

@@ -40,6 +40,7 @@ jobs:
         uses: actions/checkout@v3
       - name: Build cuSolver
         run: |
+          nvidia-smi
           cmake -B build -DUSE_CUSOLVER_LCAO=ON
           cmake --build build -j4
           cmake --install build