docs(samples): fix typo (#884)

* docs(samples): fix typo * nit

Author: stephaniewang526

samples/snippets/src/main/java/com/example/bigquery/ExportQueryResultsToS3.java

@@ -43,7 +43,8 @@ public static void main(String[] args) throws InterruptedException {
  // Export result of query to find states starting with 'W'
  String query =
  String.format(
- "EXPORT DATA WITH CONNECTION %s AS SELECT * FROM %s.%s.%s WHERE name LIKE 'W%%'",
+ "EXPORT DATA WITH CONNECTION `%s` OPTIONS(uri='%s', format='%s') "
+ + "AS SELECT * FROM %s.%s.%s WHERE name LIKE 'W%%'",
  connectionName, destinationUri, format, projectId, datasetName, externalTableName);
  exportQueryResultsToS3(query);
  }