Update files from the datasets library (from 1.18.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.18.0

README.md

@@ -21,6 +21,7 @@ task_categories:
 task_ids:
 - machine-translation
 paperswithcode_id: null
+pretty_name: Poleval2019Mt
 ---
 
 # Dataset Card for poleval2019_mt
@@ -165,4 +166,4 @@ The organization details of PolEval is present in this [link](http://2019.poleva
 
 ### Contributions
 
-Thanks to [@vrindaprabhu](https://github.com/vrindaprabhu) for adding this dataset.
+Thanks to [@vrindaprabhu](https://github.com/vrindaprabhu) for adding this dataset.