Broken link in chapter 4

[StefanoD]

Hi,

in chapter 4 at qt.io, one link is broken:

For more complex interaction, see Qt Quick Input Handlers

For some reasons the link on Github is correct.

[jonas-s-s-s]

Someone needs to check the links. I've noticed at least one or two 404 errors while reading this book. Maybe providing internet archive links as an alternative option in case the live site stops working would be a good idea.
Edit: Apparently the last commit which added anything meaningful was 2 years ago, so this project seems to be dead. Another good idea would be to add a warning to https://www.qt.io/product/qt6/qml-book that this book might contain outdated content.