Card: stamp the datamaker commit that wrote the current shards

README.md

@@ -165,7 +165,7 @@ studies and published on Zenodo in 2020 by Maurizio Pierini, Javier Duarte, Nhan
 and Marat Freytsis. This mirror was built from the two archives of that record,
 `hls4ml_LHCjet_150p_train.tar.gz` and `hls4ml_LHCjet_150p_val.tar.gz`, by the code at
 https://github.com/bb511/jet_tagging_datamaker. The data were produced at commit
-[`1718726`](https://github.com/bb511/jet_tagging_datamaker/tree/1718726) of that
+[`6ab2f90`](https://github.com/bb511/jet_tagging_datamaker/tree/6ab2f90) of that
 repository.
 
 ## Citation