Update src/utils/variable_manipulations.jl

Co-authored-by: Tapio Schneider <tapio@caltech.edu>

Author: charleskawczynski

src/utils/variable_manipulations.jl

@@ -75,7 +75,7 @@ tracer_names(field) =
 """
     foreach_tracer(f::F, Yₜ, Y) where {F}
 
-Applies a given function `f` to each scalar variable (except `ρ` and  `ρe_tot`)
+Applies a given function `f` to each grid-scale scalar variable (except `ρ` and  `ρe_tot`)
 in the state `Y` and its corresponding tendency `Yₜ`.
 This utility abstracts the process of iterating over all scalars. It uses
 `tracer_names` to identify the relevant variables and `unrolled_foreach` to