[Raytracing] Bugfix for compiling with OCC 7.6.x

See discussion https://forum.freecadweb.org/viewtopic.php?f=4&p=577109#p577109

src/Mod/Raytracing/App/RayProject.cpp

@@ -30,6 +30,7 @@
 
 #include <Base/FileInfo.h>
 #include <Base/Console.h>
+#include <Base/Stream.h>
 #include <App/Application.h>
 #include "RayProject.h"
 #include "RayFeature.h"