doc: some snippets in PathText are using Text instead, and are short / not runnable

https://doc.qt.io/qt-6/qml-qtquick-pathtext.html

I've had to fix such things before too, by specializing the docs in the subclass (such as QTBUG-106878 / QTBUG-74020). For example this brings in a snippet that is not specialized for PathText:

/*!
    \qmlproperty object QtQuick::PathText::font.features
    \since 6.6

    \include qquicktext.cpp qml-font-features
*/

It would be nice if at least one snippet was complete enough to see how it fits into the Shape, and was directly runnable. We only have one example like that: examples/quickshapes/shapes/text.qml