Update README.md

README.md

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 ---
-license: apache-2.0
+license: cc-by-4.0
 task_categories:
 - robotics
 tags:
@@ -26,7 +26,7 @@ All contents in this dataset were collected in-house by Ai2 and are provided in
 
 ## License and Use
 
-This dataset is licensed under [Apache 2.0](https://github.com/allenai/MolmoAct/blob/release/LICENSE). It is intended for research and educational use in accordance with [Ai2's Responsible Use Guidelines](https://allenai.org/responsible-use).
+This dataset is licensed under [CC BY-4.0](https://github.com/allenai/MolmoAct/blob/release/LICENSE). It is intended for research and educational use in accordance with [Ai2's Responsible Use Guidelines](https://allenai.org/responsible-use).
 
 ## Citation