Add terms to prevent inadvertent contamination

Heya! To prevent inadvertent contamination, we hosted the data on our github page with the request to not host it in a place where it could be crawled. HF has a functionality for doing that, which I added in this PR. Could you kindly add it? Many thanks! Also, would you mind adding the citation to this hosting :).

Ps: The full data is now also hosted on HF here: https://huggingface.co/datasets/facebook/multiloko

README.md

@@ -15,4 +15,9 @@ configs:
     path: "Italian_dev.jsonl"
   - split: English
     path: "English_dev.jsonl"
+
+extra_gated_heading: "Protecting the integrity of MultiLoKo for evaluation"
+extra_gated_fields: 
+  I agree not to re-host MultiLoKo in places where it could be picked up by web crawlers: checkbox
+  If I evaluate using MultiLoKo, I will ensure that its questions are not in the training data: checkbox
 ---