Robo R2 Camera Tilt Fix

These two very small parts are added to the mount to address the 10° tilt Robo introduced with the incorrect mounting position of the Raspberry Pi camera. It addresses the error in timelapse video that is tilted 10°. Causes the OctoPrint interface video to be tilted 10° because Robo's fix was to use an HTML transform to rotate the image rather than fixing the hardware.