Update README.md (#3237)

Author: mfranzke

README.md

@@ -7,7 +7,7 @@
 
 > [!IMPORTANT]
 > We've released the new stable version of the [DB UX Design System v3](https://github.com/db-ux-design-system/core-web), which is the successor to this generation of DB Design Systems.
-> Especially for new projects, we strongly recommend building on [DB UX Design System v3](https://github.com/db-ux-design-system/core-web).<!-- markdownlint-disable MD033 -->
+> Especially for new projects, we strongly recommend building on [DB UX Design System v3](https://design-system.deutschebahn.com/).<!-- markdownlint-disable MD033 -->
 > The new version has some great benefits and optimisations, especially in terms of accessibility testing, further and better framework support and ongoing development.<br>
 <!-- markdownlint-enable MD033 -->
 > Please note that we won't be providing any new features from now on, only bug fixes until EOL at the end of 2026.