cmake: [skip ci] build with Qt6 requires the module QtSvgWidgets

cMake/FreeCAD_Helpers/SetupQt.cmake

@@ -7,6 +7,7 @@ endif()
 if(BUILD_GUI)
     if (FREECAD_QT_MAJOR_VERSION EQUAL 6)
         list (APPEND FREECAD_QT_COMPONENTS GuiTools)
+        list (APPEND FREECAD_QT_COMPONENTS SvgWidgets)
     endif()
     list (APPEND FREECAD_QT_COMPONENTS OpenGL PrintSupport Svg UiTools Widgets)
     if (BUILD_WEB)
@@ -52,4 +53,4 @@ if (Qt${FREECAD_QT_MAJOR_VERSION}Core_VERSION VERSION_LESS 5.15.0)
         qt5_wrap_cpp("${outfiles}" ${ARGN})
         set("${outfiles}" "${${outfiles}}" PARENT_SCOPE)
     endfunction()
-endif()
+endif()