Use latest Oceananigans in nightly AMIP

This was previously disabled because ClimaOcean was not
compatible with the latest Oceananigans release

Author: imreddyTeja

.buildkite/nightly/pipeline.yml

@@ -29,9 +29,7 @@ steps:
       - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"Thermodynamics\", rev=\"main\"))'"
       - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"SurfaceFluxes\", rev=\"main\"))'"
       - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"RRTMGP\", rev=\"main\"))'"
-      # UNCOMMENT when ClimaOcean is updated to use the latest Oceananigans
-      # - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"Oceananigans\", rev=\"main\"))'"
-      # As of 17-Jul-25, ClimaOceans is not yet compatible with the latest Oceananigans
+      - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"Oceananigans\", rev=\"main\"))'"
       - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.add(Pkg.PackageSpec(;name=\"ClimaOcean\", rev=\"main\"))'"
       - "julia --project=experiments/ClimaEarth/ -e 'using Pkg; Pkg.resolve()'"