Update docs/quickstart.asciidoc

Co-Authored-By: István Zoltán Szabó <[email protected]>

Author: ezimuel

docs/quickstart.asciidoc

@@ -40,7 +40,7 @@ $client = ClientBuilder::create()->build();
 
 In elasticsearch-php, almost everything is configured by associative arrays.  The REST endpoint, document and optional parameters - everything is an associative array.
 
-To index a document, we need to specify four pieces of information: index, id and a document body. This is done by
+To index a document, we need to specify three pieces of information: index, id and a document body. This is done by
 constructing an associative array of key:value pairs.  The request body is itself an associative array with key:value pairs
 corresponding to the data in your document: