Update CALL import rule example (neo4j#1250)

Author: JPryce-Aklundh

modules/ROOT/pages/subqueries/call-subquery.adoc

@@ -334,8 +334,8 @@ To return imported variables they must be renamed.
 [source,cypher,role=test-fail]
 ----
 MATCH (t:Team)
-CALL (t) {
-  RETURN t
+CALL () {
+  RETURN 1 AS t
 }
 RETURN t
 ----