[Examples] Some of the examples shows empty help window on opening

MacOS 14.4.1

Qt Creator 13.0.0

Qt 6.6.3

Steps to reproduce:

1. Open Qt Creator
2. Open Welcome tab and switch Qt version to 6.6.3
3. Find 'graph gallery'
4. Open any example

Expected: The content should be available in the help window.

Actual: The help windows does not have content, because of the incorrect link used (https://doc.qt.io/qt-6/qtgraphs-axishandling-example.html instead of https://doc.qt.io/qt-6/qtgraphs-3d-axishandling-example.html )

Reproducibility:  100%