fix: broken high level intro link (#18248)

README.md

@@ -40,7 +40,7 @@ The Cosmos SDK is a framework for building blockchain applications. [CometBFT (B
 
 ## Quick Start
 
-To learn how the Cosmos SDK works from a high-level perspective, see the Cosmos SDK [High-Level Intro](https://docs.cosmos.network/main/intro/overview.html).
+To learn how the Cosmos SDK works from a high-level perspective, see the Cosmos SDK [High-Level Intro](https://docs.cosmos.network/main/learn/intro/overview).
 
 If you want to get started quickly and learn how to build on top of Cosmos SDK, visit [Cosmos SDK Tutorials](https://tutorials.cosmos.network). You can also fork the tutorial's repository to get started building your own Cosmos SDK application.