Update artis-kelvin2.sh #8303

Job	Run time
classicmode_1d_3dgrid	4m 30s
classicmode_3d	7m 56s
kilonova_1d_1dgrid	4m 52s
kilonova_1d_3dgrid	4m 48s
kilonova_2d_2dgrid	6m 52s
kilonova_2d_2dgrid_barnesthermalisation	5m 30s
kilonova_2d_2dgrid_expansionopac	4m 52s
kilonova_2d_2dgrid_xcomgammaphotoion	5m 14s
kilonova_2d_3dgrid	7m 10s
nebular_1d_3dgrid	11m 45s
nebular_1d_3dgrid_limitbfest	13m 48s
combine_checksums	18s
	1h 17m 35s

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