Improve dataset card

This PR ensures the dataset can be found at [Chain-of-Tools: Utilizing Massive Unseen Tools in the CoT Reasoning of Frozen Language Models](https://huggingface.co/papers/2503.16779).

README.md

@@ -1,3 +1,9 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+task_categories:
+- text-generation
+---
+
+This dataset was presented in [Chain-of-Tools: Utilizing Massive Unseen Tools in the CoT Reasoning of Frozen Language Models](https://huggingface.co/papers/2503.16779).
+
+Code: https://github.com/fairyshine/Chain-of-Tools