[Qt] Update to 6.8.2

[Neumann-A]

closes #43621

[WangWeiLin-MV]

Will this affect other parts? For example:

+    litehtml::media_type mediaType = litehtml::media_type_screen;

https://codereview.qt-project.org/gitweb?p=playground/qlitehtml.git;a=commitdiff;h=b9ca033303f5e2602798a20c9be31910094813e3;hp=f6030b830ad5c08a4601e8f6c79453241adc5275

[Neumann-A]

you are speaking about
- #include <litehtml/types.h>
If that include would be needed the code wouldn't compile. The correct include would be
#include <../litehtml/types.h> due to the way the target for litehtml works. using #include <types.h> would be way too general. However, #include <litehtml.h> already used in the file works just as well to get the required types.

[BillyONeal]

Thanks for the update!