Discovery: add N4NbSi2 (1NbSi2N4-1)

active_challenge.csv

@@ -786,3 +786,4 @@ OSC-01303,1N3V4-1,1N3V4-1,N3V4,discovery,light,,ok,0.17507,1.40056,8.0,4.6771,0.
 OSC-01304,1W2N3-1,1W2N3-1,N3W2,discovery,light,,ok,0.14219,1.13752,8.0,-2.0476,1.372,,0.3333,0.19423,gaussian_dos_scf_mesh,0.04299,,
 OSC-01305,1N3W4-1,1N3W4-1,N3W4,discovery,light,,ok,0.16216,1.29728,8.0,7.4325,1.148,,0.1111,0.44007,gaussian_dos_scf_mesh,0.04726,,
 OSC-01306,1N3Y4-1,1N3Y4-1,N3Y4,discovery,light,,ok,0.14877,1.19016,8.0,4.3107,0.8886,,0.1111,0.60764,gaussian_dos_scf_mesh,0.04726,,
+OSC-01307,1NbSi2N4-1,1NbSi2N4-1,N4NbSi2,discovery,light,,ok,0.15564,1.24512,8.0,-0.3222,1.0,,0.0,0.37406,gaussian_dos_scf_mesh,0.03844,,