Broken links and minor typo at QtIF doc page

There are two issues:

1. The link at the bottom of page https://doc.qt.io/QtInterfaceFramework/qtinterfaceframework-ifvehiclefunctions-climate-qml-example.html is broken. It should point to https://code.qt.io/cgit/qt/qtinterfaceframework.git/tree/examples/ifvehiclefunctions/climate-qml
2. First paragraph in https://doc.qt.io/QtInterfaceFramework/backend-system.html has text Inf Qt Interface Framework but it should be In Qt Interface Framework

Edit:
  Actually it seems that other links are broken. See https://doc.qt.io/QtInterfaceFramework/qtinterfaceframework-interfaceframework-qface-tutorial-example.html
  It might be a good idea to go through all the links