Update to Qt6.8.1 for windows

Tools/windows/BuildBotScript.cmd

@@ -6,7 +6,7 @@ rem Todo:
 rem   - [ ] It would be nice if we find a way to consistently read these path variables, so
 rem         that we don't have to adjust the script for each VC, or Qt update.
 
-set MSVCDIR_DEFAULT=C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
+set MSVCDIR_DEFAULT=C:\Program Files\Microsoft Visual Studio\2022\Community
 
 if "%MSVCDIR%"=="" (
     set "MSVCDIR=%MSVCDIR_DEFAULT%"
@@ -27,7 +27,7 @@ cmake -E remove_directory build
 cmake -E make_directory build
 
 echo start build
-cmake -S . -B build -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=D:/Qt/6.7.3/msvc2019_64
+cmake -S . -B build -GNinja -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=C:/Qt/6.8.1/msvc20122_64
 
 cmake --build build --target all