[bin] Update dumux versions to 3.8 in installscripts. (!3687) · Merge requests · dumux-repositories / dumux

What this MR does / why does DuMux need it:
Bump the dumux versions to 3.8 in the installscripts.

Before you request a review from someone, make sure to revise the following points:

do the test pipelines pass? (see guide on how to run pipelines for a merge request)

Edited Oct 30, 2023 by Timo Koch

[bin] Update dumux versions to 3.8 in installscripts.