[REG] macOS-specific widget documentation is missing

Error 404:

• https://doc.qt.io/qt-5/qmacnativewidget.html
• https://doc.qt.io/qt-5/qmaccocoaviewcontainer.html

Also, the above class names lost their hyperlinks at https://doc.qt.io/qt-5/qtmacextras-module.html

The pages existed when Qt 5.13.0 was released:

• https://webcache.googleusercontent.com/search?q=cache:q7oOz0BajPwJ:https://doc.qt.io/qt-5/qmacnativewidget.html
• https://webcache.googleusercontent.com/search?q=cache:efGCpgScOAsJ:https://doc.qt.io/qt-5/qmaccocoaviewcontainer.html

Could this be a side-effect of fixing QTBUG-76984?