Remove typo, fix direction of edge

Author: szarnyasg

cypher/queries/bi-18.cypher

@@ -2,7 +2,7 @@
 /*
 :param [{ person1Id, tag }] => {RETURN 2 AS person1Id, 'Snowboard' AS tag}
 */
-MATCH (person1:Person {id: $person1Id})-[:KNOWS]-(mutualFriend:Person)-[:KNOWS]-(person2:Person)-[:HAS_INTEREST]-(q:Tag {name: $tag})
+MATCH (person1:Person {id: $person1Id})-[:KNOWS]-(mutualFriend:Person)-[:KNOWS]-(person2:Person)-[:HAS_INTEREST]->(:Tag {name: $tag})
 WHERE person1 <> person2
   AND NOT (person1)-[:KNOWS]-(person2)
 RETURN person2.id AS person2Id, count(DISTINCT mutualFriend) AS mutualFriendCount