Add link to paper and task category

This PR ensures the dataset is linked to (and can be found at) https://huggingface.co/papers/2412.03735, and that it's categorized correctly.

README.md

@@ -1,3 +1,7 @@
----
-license: cc-by-nc-nd-4.0
----
+---
+license: cc-by-nc-nd-4.0
+task_categories:
+- video-text-to-text
+---
+
+This repository contains the data of the paper [VidHalluc: Evaluating Temporal Hallucinations in Multimodal Large Language Models for Video Understanding](https://huggingface.co/papers/2412.03735).