Resolve #3460070 "Improve schemadotorg entity reference override"

Closes #3460070

modules/schemadotorg_entity_reference_override/config/schema/schemadotorg_entity_reference_override.settings.schema.yml

@@ -9,6 +9,15 @@ schemadotorg_entity_reference_override.settings:
         type: mapping
         label: 'Entity reference override Schema.org property'
         mapping:
+          override_format:
+            type: string
+            label: 'Custom text format'
+          override_label:
+            type: label
+            label: 'Custom text label'
+          override_action:
+            type: string
+            label: 'Use custom text to'
           type:
             type: string
             label: Type