L1: minor bugfix

L1: bugfix in time grid creation

requested review from @v.akishina

assigned to @se.gorbunov

enabled an automatic merge when the pipeline for 2f05608a succeeds

Dear @f.uhlig, @v.friese, @p.-a.loizeau, @se.gorbunov, @v.akishina,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged