CATKEL: Clamp TKE diffusivity (#4897)

Author: ali-ramadhan

src/TurbulenceClosures/turbulence_closure_implementations/TKEBasedVerticalDiffusivities/catke_vertical_diffusivity.jl

@@ -333,7 +333,7 @@ end
     κe_max = closure.maximum_tke_diffusivity
     κe★ = min(κe, κe_max)
     FT = eltype(grid)
-    return FT(κe)
+    return FT(κe★)
 end
 
 @inline viscosity(::FlavorOfCATKE, diffusivities) = diffusivities.κu