Use new MERGE syntax in example (#1056)

The usage of CREATE UNIQUE Cypher query in the example has been deprecated and has been substituted with the updated MERGE syntax.

Co-authored-by: Antonio Barcélos <antonio.barcelos@neo4j.com>

Author: JacobLinCool

packages/neo4j-driver/examples/neo4j.html

@@ -265,7 +265,7 @@ <h1>
 
       if (document.location.href.indexOf('example') >= 0) {
         document.getElementById('statement').textContent =
-          'MERGE (alice:Person {name: $name_a, age: $age_a})\nMERGE (bob:Person {name: $name_b, age: $age_b})\nCREATE UNIQUE (alice)-[alice_knows_bob:KNOWS]->(bob)\nRETURN alice, bob, alice_knows_bob'
+          'MERGE (alice:Person {name: $name_a) ON CREATE SET alice.age = $age_a\nMERGE (bob:Person {name: $name_b}) ON CREATE SET bob.age = $age_b\nMERGE (alice)-[alice_knows_bob:KNOWS]->(bob)\nRETURN alice, bob, alice_knows_bob'
 
         addParameter('name_a', 'Alice')
         addParameter('age_a', 33)

packages/neo4j-driver/examples/node.js

@@ -20,9 +20,9 @@
 var neo4j = require('neo4j')
 
 var query = [
-  'MERGE (alice:Person {name:{name_a},age:{age_a}})',
-  'MERGE (bob:Person {name:{name_b},age:{age_b}})',
-  'CREATE UNIQUE (alice)-[alice_knows_bob:KNOWS]->(bob)',
+  'MERGE (alice:Person {name:$name_a}) ON CREATE SET alice.age = $age_a',
+  'MERGE (bob:Person {name:$name_b}) ON CREATE SET bob.age = $age_b',
+  'MERGE (alice)-[alice_knows_bob:KNOWS]->(bob)',
   'RETURN alice, bob, alice_knows_bob'
 ]