StudioWelcome: Use Titillium on Windows again

QTBUG-94529 seems to be fixed in Qt 6.2 Beta 2.

Task-number: QDS-4539
Change-Id: I8b4981f9b023060a6ad2ed8a623f4d0ae3c5d5f7
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/studiowelcome/studiowelcomeplugin.cpp

@@ -333,11 +333,9 @@ bool StudioWelcomePlugin::initialize(const QStringList &arguments, QString *erro
 
     m_welcomeMode = new WelcomeMode;
 
-    if (!Utils::HostOsInfo::isWindowsHost()) {
     QFontDatabase::addApplicationFont(":/studiofonts/TitilliumWeb-Regular.ttf");
     QFont systemFont("Titillium Web", QApplication::font().pointSize());
     QApplication::setFont(systemFont);
-    }
 
     m_removeSplashTimer.setSingleShot(true);
     m_removeSplashTimer.setInterval(15000);