Add dataset card, link to paper

This PR ensures the dataset can be found at https://huggingface.co/datasets?task_categories=task_categories:question-answering. It also links to the paper and code repository.

README.md

@@ -0,0 +1,7 @@
+---
+task_categories:
+- question-answering
+---
+This repository contains the dataset for the paper [Temporal Bias Analysis in Large Language Models](https://arxiv.org/abs/2412.15698).
+
+Code: https://github.com/gagan3012/EAIS-Temporal-Bias