README link to license guide 404s

This updates the link

Author: janjongboom

README.md

@@ -28,7 +28,7 @@ The [release notes](https://os.mbed.com/releases) detail the current release. Yo
 
 The software is provided under the [Apache-2.0 license](LICENSE-apache-2.0.txt). Contributions to this project are accepted under the same license. Please see [contributing.md](CONTRIBUTING.md) for more information.
 
-This project contains code from other projects. The original license text is included in those source files. They must comply with our [license guide](https://os.mbed.com/docs/latest/reference/license.html).
+This project contains code from other projects. The original license text is included in those source files. They must comply with our [license guide](https://os.mbed.com/docs/mbed-os/latest/contributing/license.html).
 
 Folders containing files under different permissive license than Apache 2.0 are listed in the [LICENSE](LICENSE) file.