Merge topic 'TestingRendering-missing-optional-depends'

bdebee02 Testing/Rendering: optionally depend on `VTK::ParallelMPI`
0e4b0a68 vtkModule: fix typo in comment

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Yohann Bearzi (Kitware) <yohann.bearzi@kitware.com>
Merge-request: !10936