Enable MULTI_NOZZLE_DUPLICATION for BIBO (#16435)

config/examples/BIBO/TouchX/default/Configuration_adv.h

 #define AXIS_RELATIVE_MODES { false, false, false, false }
 
 // Add a Duplicate option for well-separated conjoined nozzles
-//#define MULTI_NOZZLE_DUPLICATION
+#define MULTI_NOZZLE_DUPLICATION
 
 // By default pololu step drivers require an active high signal. However, some high power drivers require an active low signal as step.
 #define INVERT_X_STEP_PIN false