maint: update naming

main.py

@@ -292,7 +292,7 @@ class LBMatrix:
     @staticmethod
     def get_name_for_lb(lb_key, lb_value):
         if lb_key == "imputation":
-            return "All Models" if lb_value == "no" else "With Imputed Models"
+            return "Models (w/o imputation)" if lb_value == "no" else "Models (with imputation)"
         if lb_key == "splits":
             return "All Repeats" if lb_value == "all" else "Lite"
         if lb_key == "tasks":