Improve dataset card

This PR adds the relevant task category and link to the code.

README.md

@@ -1 +1,8 @@
-arxiv.org/abs/2412.11983
+---
+task_categories:
+- graph-ml
+---
+
+This repository contains the data presented in [Leveraging Large Language Models for Effective Label-free Node Classification in Text-Attributed Graphs](arxiv.org/abs/2412.11983).
+
+Code: https://github.com/HKBU-LAGAS/Locle