fixed subheading (#2868)

Co-authored-by: Agnieszka Gancarczyk <agancarc@redhat.com>

public/resources/en/client-scopes.json

@@ -43,6 +43,7 @@
   "chooseAMapperType": "Choose a mapper type",
   "addPredefinedMappers": "Add predefined mappers",
   "predefinedMappingDescription": "Choose any of the predefined mappings from this table",
+  "configureMappingDescription": "Choose any of the mappings from this table",
   "mappingTable": "Table with predefined mapping",
   "scope": "Scope",
   "roleMappingUpdatedSuccess": "Role mapping updated",

src/client-scopes/add/MapperDialog.tsx

@@ -93,7 +93,11 @@ export const AddMapperDialog = (props: AddMapperDialogProps) => {
           <Text component={TextVariants.h1}>
             {isBuiltIn ? t("addPredefinedMappers") : t("emptySecondaryAction")}
           </Text>
-          <Text>{t("predefinedMappingDescription")}</Text>
+          <Text>
+            {isBuiltIn
+              ? t("predefinedMappingDescription")
+              : t("configureMappingDescription")}
+          </Text>
         </TextContent>
       }
       isOpen={props.open}