Update README.md

README.md

@@ -1,5 +1,5 @@
 ---
-license: cc-by-nc-sa-4.0
+license: apache-2.0
 language:
 - en
 tags:
@@ -20,5 +20,5 @@ This is a dataset repository. Please check all the information in our paper and
 Check this [code](https://github.com/ai4cat/AI4C-ML) for using the dataset.
 
 ## Licensing Information
-This dataset is licensed under the [CC-BY-NC-SA-4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/deed.en) License.
+This dataset is licensed under the Apache license 2.0.