Add link to paper and code

This PR ensures the dataset is linked to (and can be found at) https://huggingface.co/papers/2506.00482.

README.md

@@ -1,4 +1,8 @@
 ---
 task_categories:
 - text-generation
----
+---
+
+This dataset is presented in the paper [BenchHub: A Unified Benchmark Suite for Holistic and Customizable LLM Evaluation](https://huggingface.co/papers/2506.00482).
+
+Code: https://github.com/rladmstn1714/BenchHub