update some broken links

CONTRIBUTING.md

@@ -24,7 +24,7 @@ Botonic is structured as a monorepo as this allows us to have a simplified organ
 * [botonic/packages](https://github.com/hubtype/botonic/tree/master/packages) - Here live all packages that allow Botonic to work in harmony. The convention for the packages is `botonic-[botonic--main-package-name]` for the main packages and `botonic-plugin-[botonic-plugin-name]` for plugins.
 	* [botonic-cli](https://github.com/hubtype/botonic/tree/master/packages/botonic-cli): here resides the code of the CLI interface that allows you to create, build and deploy your projects.
 	* [botonic-core](https://github.com/hubtype/botonic/tree/master/packages/botonic-core): the conducting package of Botonic, responsible of interpreting the bot flows, processing the inputs, dealing with the plugins... summarizing, all the internal logic.
-	* [botonic-react](https://github.com/hubtype/botonic/tree/master/packages/botonic-react): this allows you to build your chatbots with React, all the [components](https://docs.botonic.io/main-concepts/components) and [Webchat's logic](https://docs.botonic.io/main-concepts/webchat) can be found here.
+	* [botonic-react](https://github.com/hubtype/botonic/tree/master/packages/botonic-react): this allows you to build your chatbots with React, all the [components](https://docs.botonic.io/components/components) and [Webchat's logic](https://docs.botonic.io/concepts/webchat) can be found here.
 	* [botonic-nlu](https://github.com/hubtype/botonic/tree/master/packages/botonic-nlu): an extension to provide Natural Language Understanding (NLU) to work alongside `botonic-cli`.
 	* ...and a rich ecosystem of [plugins](https://docs.botonic.io/plugins/using-plugins) that allows you to extend Botonic's functionalities!
 * [botonic/docs](https://github.com/hubtype/botonic/tree/master/docs) - Here is where we document the project. To do so, we use [docz](https://www.docz.site/). You can find the documentation for this project at [docs.botonic.io](https://docs.botonic.io/).