Update MOM6 to latest on NCAR/MOM6:dev/ncar_main_candidate_25Feb

MOM6 at https://github.com/NCAR/MOM6/tree/a867971af924477c88643f4d1f46a6baa4ddede4

Author: dougiesquire

spack.yaml

@@ -11,7 +11,7 @@ spack:
     # Main Dependencies
     access-om3-nuopc:
       require:
-        - '@git.0.4.0'
+        - '@git.be6b6aad1ee1b2e190f50240b038ef4d266cc7a7'
         - configurations=MOM6,MOM6-CICE6,MOM6-CICE6-WW3
 
     # Other Dependencies
@@ -53,4 +53,4 @@ spack:
           - access-om3-nuopc
         projections:
           access-om3: '{name}/2025.01.1'
-          access-om3-nuopc: '{name}/0.4.0-{hash:7}'
+          access-om3-nuopc: '{name}/be6b6aad1ee1b2e190f50240b038ef4d266cc7a7-{hash:7}'