spack.yaml: Moved dependency versions into packages section (#23)

spack.yaml

@@ -5,7 +5,24 @@
 spack:
   # add package specs to the `specs` list
   specs:
-  - access-om2 ^[email protected] ^[email protected] ^[email protected] ^[email protected] ^[email protected] ^[email protected] ^[email protected] %[email protected]
+  - [email protected]
+  packages:
+    cice5:
+      require: '@git.2023.10.19'
+    mom5:
+      require: '@git.2023.11.09'
+    libaccessom2:
+      require: '@git.2023.10.26'
+    oasis3-mct:
+      require: '@git.2023.11.09'
+    netcdf-c:
+      require: '@4.7.4'
+    netcdf-fortran:
+      require: '@4.5.2'
+    nci-openmpi:
+      require: '@4.0.2'
+    all:
+      compiler: [[email protected]]
   view: true
   concretizer:
     unify: true