Resolve #3453919 "Improve taxonomy"

Closes #3453919

modules/schemadotorg_taxonomy/config/schema/schemadotorg_taxonomy.settings.schema.yml

@@ -30,6 +30,12 @@ schemadotorg_taxonomy.settings:
           group:
             type: string
             label: 'Group name'
+          schema_types:
+            type: sequence
+            label: 'Schema.org types'
+            sequence:
+              type: string
+              label: 'Schema.org type'
     schema_property_vocabularies:
       type: sequence
       label: 'Default properties'