Added step_no to sum_co2_inventory

[turquoisedragon2926]

Line 1971 in utils.jl:

jutul_message("CO2 Inventory", "Inconsistent masses in $(length(bad_cells)) cells for step $step_no. Maybe tolerances were relaxed?", color = :yellow)

But step_no is not passed as a parameter to sum_co2_inventory

Fix is just passing step_no as a input to the function sum_co2_inventory

[moyner]

Hi! Thanks a lot - that kwarg got lost in a refactoring. The doc failure is due to Julia 1.11 so I will merge anyway.