[no ci] Update openmpi from 4.1.4 to 4.1.5 as it is no longer a valid external

Author: CodeGat

spack.yaml

@@ -19,7 +19,7 @@ spack:
       - roms_application='upwelling'
     openmpi:
       require:
-      - '@4.1.4'
+      - '@4.1.5'
     netcdf-c:
       require:
       - '@4.7.3'