Fix build with new HDF5 (1.10.8+ or 1.12.1+)
Newer HDF5 changes hdf5.h from _HDF_H to HDF_H [1] therefore it collides with hdf5.h from kst [2].
[1] https://github.com/HDFGroup/hdf5/blob/hdf5-1_10_8/src/hdf5.h#L20 https://github.com/HDFGroup/hdf5/blob/hdf5-1_12_1/src/hdf5.h#L20 [2] https://invent.kde.org/graphics/kst-plot/-/blob/master/src/datasources/hdf5/hdf5.h#L15