change link for free ebook

_data/books.yaml

@@ -1,9 +1,9 @@
-- title: "Quarkus in Action"
+- title: "Quarkus in Action - Free ebook"
   description: "Build resilient and scalable, cloud-native, enterprise Java applications using the Quarkus framework."
   publish-date: Currently in Early access, final version estimated Q3 2023
   authors: Martin Štefanko and Jan Martiška
   thumbnail: quarkus-in-action-meap.png
-  link: https://www.manning.com/books/quarkus-in-action
+  link: https://developers.redhat.com/e-books/quarkus-action
 - title: "Full Stack Quarkus and React: Hands-on full stack web development with Java, React, and Kubernetes"
   description: "Create and deploy standalone, fully functional, web applications using Quarkus and React"
   publish-date: November 2022