QCborStreamReader::hasNext() doesn't work as the document describes.

https://doc.qt.io/qt-6/qcborstreamreader.html#hasNext

https://doc.qt.io/qt-6/qcborstreamreader.html#leaveContainer

Those documents say that hasNext is false when the end of the cborstream but it isn't.

Reproduce.

1. Reading qquicktimeline's  binary keyframes.
   Its format is [ [ string, version, format [ data,........ ]].
2. After reading all the data , call hasNext() before endContainer()
   return value will be true. (expected value is false)
3. After calling next(), call hasNext()
   return value will be false.

See also,

https://codereview.qt-project.org/c/qt/qtquicktimeline/+/622899/1/src/timeline/qquickkeyframe.cpp#159