ospraymaterials: bump materials tarball

Corresponds to tag pv_v5.9.0 in https://gitlab.kitware.com/paraview/materials repository.

Closes #174 (closed)

Backport: release

changed milestone to %5.9 (Fall 2020)

mentioned in merge request !792 (closed)

@aron.helser

thanks, +1

changed the description

I confirmed that the materials are included in the binary produced by the test.

Do: merge

mentioned in commit 337c83b2

mentioned in commit 264240c9

merged