Add 9 as np

Author: rohanbabbar04

.github/workflows/build.yml

@@ -45,7 +45,7 @@ jobs:
       - name: Debug MPI Execution
         run: |
           echo "Starting MPI test"
-          mpiexec --oversubscribe -n 9 hostname
+          mpiexec -n 9 hostname
           echo "MPI test completed"
 #      - name: Testing using pytest-mpi
 #        run: mpiexec -n ${{ matrix.rank }} pytest tests/ --with-mpi