Update http_client.rst

Author: ybenhssaien

http_client.rst

@@ -197,10 +197,7 @@ The HTTP client also has one configuration option called
 
     .. code-block:: php-standalone
 
-        $client = HttpClient::create([
-            'max_host_connections' => 10,
-            // ...
-        ]);
+        $client = HttpClient::create([], 10);
 
 Scoping Client
 ~~~~~~~~~~~~~~