[Backport 8.1] Update connecting documentation (#1668)

Co-authored-by: Tomas Della Vedova <delvedor@users.noreply.github.com>

docs/examples/ignore.asciidoc

@@ -8,7 +8,10 @@ HTTP status codes which should not be considered errors for this request.
 'use strict'
 
 const { Client } = require('@elastic/elasticsearch')
-const client = new Client({ node: 'http://localhost:9200' })
+const client = new Client({
+  cloud: { id: '<cloud-id>' },
+  auth: { apiKey: 'base64EncodedKey' }
+})
 
 async function run () {
   const bulkResponse = await client.bulk({