fix readme license link
@@ -233,4 +233,4 @@ We are glad to have contributors out of the core team; contributions, including
welcomed. Please refer to our [contribution guideline](https://github.com/iotexproject/iotex-core/blob/master/CONTRIBUTING.md) for more information.
## License
-This project is licensed under the [Apache License 2.0](https://github.com/iotexproject/iotex-core/blob/master/LICENSE.md).
+This project is licensed under the [Apache License 2.0](https://github.com/iotexproject/iotex-core/blob/master/LICENSE).
