update readme template

data/unified_datasets/README_TEMPLATE.md

-## Dataset Card for [dataset name]
+# Dataset Card for [dataset name]
 
 - **Repository:** data link
 - **Paper:** paper link

data/unified_datasets/multiwoz21/README.md

-## Dataset Card for MultiWOZ 2.1
+# Dataset Card for MultiWOZ 2.1
 
 - **Repository:** https://github.com/budzianowski/multiwoz
 - **Paper:** https://aclanthology.org/2020.lrec-1.53
 - **Leaderboard:** https://github.com/budzianowski/multiwoz
-- **Who transforms the dataset:** [Qi Zhu](zhuq96@gmail.com)
+- **Who transforms the dataset:** Qi Zhu(zhuq96@gmail.com)
 
 ### Dataset Summary