update the actions descriptions

Author: renetapopova

modules/ROOT/pages/tools/neo4j-admin/neo4j-admin-import.adoc

@@ -1447,9 +1447,10 @@ If no action is specified, the import tool works as in full import mode, creatin
 The following actions are supported:
 
 * `empty` = `CREATE` (default)
-* `C`, `CREATE` - Creates a new entity.
-* `U`, `UPDATE` - Updates an existing entity.
-* `D`, `DELETE` - Deletes an existing entity.
+* `C`, `CREATE` - Creates new nodes and relationships with or without properties.
+* `U`, `UPDATE` - Updates existing nodes, relationships, or properties.
+Leaving the property identifier empty is like having a “*” wild card.
+* `D`, `DELETE` - Deletes an existing node or relationship.
 Deleting a node also deletes its relationships (`DETACH DELETE`).