Add task category and link to paper

This PR adds a description of the dataset, a link to the paper, and sets the task category.

README.md

@@ -1,3 +1,9 @@
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-license: cc-by-nc-sa-4.0
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+---
+license: cc-by-nc-sa-4.0
+task_categories:
+- video-text-to-text
+---
+
+This dataset is for the paper [ViSpeak: Visual Instruction Feedback in Streaming Videos](https://arxiv.org/abs/2503.12769).
+
+Github: https://github.com/HumanMLLM/ViSpeak-Bench