rbutil: add qt version check for setIniCodec

QSettings::setIniCodec was deprecated in qt6, this fixes building with it.
Change-Id: Icd2ac05bb0a9f56181823a25a9307ac791664d88

utils/rbutilqt/base/playerbuildinfo.cpp

@@ -92,7 +92,9 @@ PlayerBuildInfo::PlayerBuildInfo() :
      serverInfo(nullptr),
      playerInfo(":/ini/rbutil.ini", QSettings::IniFormat)
 {
+#if QT_VERSION < 0x060000
     playerInfo.setIniCodec("UTF-8");
+#endif
 
 }