fixed typo in README

extensions/elasticsearch/README.md

@@ -13,7 +13,7 @@ return [
 	'components' => [
         'elasticsearch' => [
             'class' => 'yii\elasticsearch\Connection',
-            'hosts' => [
+            'nodes' => [
                 ['http_address' => '127.0.0.1:9200'],
                 // configure more hosts if you have a cluster
             ],
@@ -145,4 +145,4 @@ $query->addStatisticalFacet('click_stats', ['field' => 'visit_count']);
 $query->search(); // gives you all the records + stats about the visit_count field. e.g. mean, sum, min, max etc...
 ```
 
-And there is so much more in it. "it’s endless what you can build"[¹](http://www.elasticsearch.org/)
\ No newline at end of file
+And there is so much more in it. "it’s endless what you can build"[¹](http://www.elasticsearch.org/)