Geometry: update MDI support

Change material from CFRP_CMS to CFRP_M55J (99% of C and 1.91g/cm3 density), thickness from 2.5mm to 0.5mm. Since radiation length of CFRP_CMS ~29.1cm and M55J ~22.3cm, the X/X0 is changed from 0.86% to 0.23%