Update README_ZIH.md

Now the master of ogs can be used. For HPC there might be one problem left:

Chunk_space in HdfData can only be increased hardcoded e.g. from

chunk_space =
    (size_tuple > 1)
        ? std::vector<Hdf5DimType>{partition_info.longest_local_length,
                                   size_tuple}
        : std::vector<Hdf5DimType>{partition_info.longest_local_length};

to

chunk_space =
    (size_tuple > 1)
        ? std::vector<Hdf5DimType>{partition_info.longest_local_length*16,
                                   size_tuple}
        : std::vector<Hdf5DimType>{partition_info.longest_local_length*16};