Update sn3d.h #7063

Job	Run time
classicmode_1d_3dgrid	2m 15s
classicmode_3d	2m 20s
kilonova_1d_1dgrid	3m 31s
kilonova_1d_3dgrid	3m 16s
kilonova_2d_2dgrid	3m 31s
kilonova_2d_2dgrid_barnesthermalisation	5m 24s
kilonova_2d_2dgrid_expansionopac	2m 16s
kilonova_2d_2dgrid_xcomgammaphotoion	2m 33s
kilonova_2d_3dgrid	3m 28s
nebular_1d_3dgrid	2m 37s
nebular_1d_3dgrid_limitbfest	2m 48s
classicmode_1d_3dgrid testmode ON	16m 15s
classicmode_3d testmode ON	19m 53s
kilonova_1d_1dgrid testmode ON	10m 30s
kilonova_1d_3dgrid testmode ON	11m 8s
kilonova_2d_2dgrid testmode ON	18m 23s
kilonova_2d_2dgrid_barnesthermalisation testmode ON	16m 35s
kilonova_2d_2dgrid_expansionopac testmode ON	15m 3s
kilonova_2d_2dgrid_xcomgammaphotoion testmode ON	15m 40s
kilonova_2d_3dgrid testmode ON	18m 3s
nebular_1d_3dgrid testmode ON	18m 0s
nebular_1d_3dgrid_limitbfest testmode ON	17m 54s
combine_checksums	11s
	3h 31m 34s

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