docs: use github pages for master release docs

[ci skip]

Author: MarcusNotheis

README.md

@@ -28,7 +28,7 @@ This project was formerly known as `fiori-for-react`.
 
 You can find our documentation under the following links:
 - [Stable Release Documentation](https://sap.github.io/ui5-webcomponents-react/)
-- [Next Release Documentation](https://ui5-webcomponents-react.netlify.app/)
+- [Next Release Documentation](https://sap.github.io/ui5-webcomponents-react/master/)
 
 ## Migration Guide
 Migrating your app from `v0.8.X` to `v0.9.0` requires a few updates. You can find the most important changes and how to adapt your code to migrate to `v0.9.0` in our [Migration Guide](https://github.com/SAP/ui5-webcomponents-react/blob/master/docs/MigrationGuide.md).