Update dapper/mods/L96s/Grudzien2020.py
Update dapper/mods/L96s/Grudzien2020.py

Co-authored-by: Patrick N. Raanes <47bfd51f7549bab6747991f27c29edf54b04fdf6@gmail.com>
nansencenter/DAPPER,nansencenter/DAPPER