Some terms in the document need further elaboration

(link  : https://doc.qt.io/qt-6/qtserialport-index.html

*This may exist in different versions of the document. So please check if that's the case and fix it accordingly as well(At least currently supported versions).

In the Qt Serial Port document, there is a section which explains the unsupported features.

To me, they all kind of sound ambiguous.

Expecially "Text Mode" and "Pinout signal change notification".

I googled both terms but there were not good articles on them.

Since here is the only appearance of these terms in the document, some readers cannot understand what exactly are not supported by this module.

We need to add a sentence under each bullet point to elaborate what they exactly mean(or realistic example to help understanding), otherwies, some customers, who may use Qt for their "serious" commercial purpose, need to proceed on the project without a clear understandings on what this module cannot do, or it's guaranteed that R&D will need to deal with the same questions all over again from presales engineers or support team.