[Backport 8.1] Update connecting documentation (#1668)

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

docs/basic-config.asciidoc

@@ -10,7 +10,8 @@ offers.
 const { Client } = require('@elastic/elasticsearch')
 
 const client = new Client({
-  node: 'http://localhost:9200',
+  cloud: { id: '<cloud-id>' },
+  auth: { apiKey: 'base64EncodedKey' }
   maxRetries: 5,
   requestTimeout: 60000,
   sniffOnStart: true
@@ -241,7 +242,7 @@ _Cloud configuration example:_
 ----
 const client = new Client({
   cloud: {
-    id: 'name:bG9jYWxob3N0JGFiY2QkZWZnaA=='
+    id: '<cloud-id>'
   },
   auth: {
     username: 'elastic',