UI: Fix wrong error message when trying to apply modifier

The error message when trying to apply a constructive modifier on a curve
object was wrong, "transform" makes no sense in this context.

Thanks Philipp for pointing it out!

source/blender/editors/object/object_modifier.cc

@@ -789,7 +789,9 @@ static bool modifier_apply_obdata(
 
     if (ELEM(mti->type, eModifierTypeType_Constructive, eModifierTypeType_Nonconstructive)) {
       BKE_report(
-          reports, RPT_ERROR, "Transform curve to mesh in order to apply constructive modifiers");
+          reports,
+          RPT_ERROR,
+          "Cannot apply constructive modifiers on curve. Convert curve to mesh in order to apply");
       return false;
     }