docs(readme): fix kro-concepts link

Author: Dimitri GRISARD

README.md

@@ -24,7 +24,7 @@ kro is Kubernetes native and integrates seamlessly with existing tools to preser
 [kro-overview]: https://kro.run/docs/overview
 [kro-installation]: https://kro.run/docs/getting-started/Installation
 [kro-getting-started]: https://kro.run/docs/getting-started/deploy-a-resource-graph-definition
-[kro-concepts]: https://kro.run/docs/concepts/resource-graph-definitions/
+[kro-concepts]: https://kro.run/docs/concepts/resource-group-definitions
 [kro-examples]: https://kro.run/examples/
 
 ## FAQ