Add Zenodo data link in dataset card

Add data link to Zenodo, as reported by

@hamel

.

README.md

@@ -316,6 +316,7 @@ config_names:
 - **Homepage:** https://wandb.ai/github/CodeSearchNet/benchmark
 - **Repository:** https://github.com/github/CodeSearchNet
 - **Paper:** https://arxiv.org/abs/1909.09436
+- **Data:** https://zenodo.org/record/7908468
 - **Leaderboard:** https://wandb.ai/github/CodeSearchNet/benchmark/leaderboard
 
 ### Dataset Summary