update default cfg for ilamb (#729)

Author: chengzhuzhang

zppy/defaults/default.ini

@@ -349,7 +349,7 @@ ts_years = string_list(default=list(""))
 # `years = "1-100",` would plot years 1 to 100 on the graphs.
 
 [ilamb]
-cfg = string(default="inclusions/ilamb/cmip.cfg")
+cfg = string(default="inclusions/ilamb/ilamb.cfg")
 # Name of the `[e3sm_to_cmip]` atm subtask to depend on
 e3sm_to_cmip_atm_subsection = string(default="")
 # Name of the `[e3sm_to_cmip]` land subtask to depend on