Update access-esm1p6 version to 2026.01.000

Author: aidanheerdegen

spack.yaml

@@ -9,7 +9,7 @@
 # - CICE5 from ESM1.6 branch
 spack:
   specs:
-    - access-esm1p6@git.2025.12.001 cice=5
+    - access-esm1p6@git.2026.01.000 cice=5
   packages:
     # Coupler
     oasis3-mct: