Fix after review

Author: curquiza

spec/meilisearch/index/documents_spec.rb

@@ -122,7 +122,7 @@
       expect(response).to have_key('updateId')
       expect(index.documents.count).to eq(documents.count + 1)
       expect(index.document(id)['title']).to eq(title)
-      index.delete_document(id)
+      response = index.delete_document(id)
       index.wait_for_pending_update(response['updateId'])
     end