Update code_sample of updateDocuments

Author: bidoubiwa

.code-samples.meilisearch.yaml

@@ -22,8 +22,9 @@ add_or_replace_documents_1: |-
   }])
 add_or_update_documents_1: |-
   client.getIndex('movies').updateDocuments([{
-      movieskud: 287947,
-      title: 'Shazam ⚡️'
+      id: 287947,
+      title: 'Shazam ⚡️',
+      genre: 'comedy'
   }])
 delete_all_documents_1: |-
   client.getIndex('movies').deleteAllDocuments()