docs: Update the tutorials link (#10259)

The current link points to an old version of the Nameservice tutorial (still on Launchpad 🥶). Updated the link to to point to https://tutorials.cosmos.network There is a PR with the updated version opened in the tutorials repo and the most up-to-date version is hosted on https://docs.starport.network/guide/nameservice/

README.md

@@ -52,7 +52,7 @@ breaking changes.
 
 To learn how the SDK works from a high-level perspective, go to the [SDK Intro](./docs/intro/overview.md).
 
-If you want to get started quickly and learn how to build on top of the SDK, please follow the [SDK Application Tutorial](https://tutorials.cosmos.network/nameservice/tutorial/00-intro.html). You can also fork the tutorial's repository to get started building your own Cosmos SDK application.
+If you want to get started quickly and learn how to build on top of the SDK, please visit the [tutorials website](https://tutorials.cosmos.network). You can also fork the tutorial's repository to get started building your own Cosmos SDK application.
 
 For more, please go to the [Cosmos SDK Docs](./docs/).