Computational Homogenization example show result for different mesh than indicated by tutorial

For generating the results in the tutorial, we use the coarse mesh file, but that is not visible from the actual tutorial. This implies that users trying to replicate the results will not be able to do so (without knowing this).

Would probably be good to either highlight this, or switch to not hide that we use the coarse and rather state that the "nice" figures are generated with the fine mesh file.