 wrong download link for the Sparse file

Hi,

There is a wrong link in the _README.md_ file in the Download section for version 2.0.0. where the Sparse link should be:

[SynthTatNet-part4](https://ds4sd-public-artifacts.s3.eu-de.cloud-object-storage.appdomain.cloud/datasets/synthtabnet_public/v2.0.0/sparse.zip)


