Discovery: add Ag2S2 (2AgS-3)

active_challenge.csv

@@ -387,3 +387,4 @@ OSC-00411,1O2N3Ti4-1,1O2N3Ti4-1,N3O2Ti4,discovery,light,,ok,0.1214,0.9712,8.0,3.
 OSC-00412,1VW3O8-1,1VW3O8-1,O8VW3,discovery,light,,ok,0.20813,1.66504,8.0,-2.0428,0.9477,,0.0556,0.11406,gaussian_dos_scf_mesh,0.04523,,
 OSC-00414,1AuAg2Se2-1,1AuAg2Se2-1,Ag2AuSe2,discovery,light,,ok,0.24009,1.92072,8.0,-0.46,1.3739,,0.3333,0.55456,gaussian_dos_scf_mesh,0.04299,,
 OSC-00415,2AgGeS3-1,2AgGeS3-1,Ag2Ge2S6,discovery,light,,ok,0.13441,1.07528,8.0,-3.6852,1.5565,,0.5556,0.3534,gaussian_dos_scf_mesh,0.0,,
+OSC-00416,2AgS-3,2AgS-3,Ag2S2,discovery,light,,ok,0.17182,1.37456,8.0,-1.4796,0.7845,,0.2222,1.34389,gaussian_dos_scf_mesh,0.04812,,