Support openmpi for rank=9

Author: rohanbabbar04

.github/workflows/build.yml

@@ -20,8 +20,6 @@ jobs:
         exclude:
           - os: macos-latest
             mpi: 'intelmpi'
-          - mpi: 'openmpi'
-            rank: '9' # works locally, not in CI
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout