typo in Marlin.cpp

Marlin/src/Marlin.cpp

         }
       #endif // !SWITCHING_EXTRUDER
 
-      gcode.refresh_cmd_timeout()
+      gcode.refresh_cmd_timeout();
 
       const float olde = current_position[E_AXIS];
       current_position[E_AXIS] += EXTRUDER_RUNOUT_EXTRUDE;