Swap to openmpi/508

Author: manodeep

spack.yaml

@@ -28,7 +28,7 @@ spack:
         - '@git.access-esm1.5-2025.03.001=access-esm1.5'
     openmpi:
       require:
-        - '@5.0.5'
+        - '@5.0.8'
     netcdf-c:
       require:
         - '@4.9.2'