fix wrong statment in manual. (#695)

Author: arjenzhou

MANUAL.md

@@ -79,7 +79,7 @@ batchPoints.point(Point.measurement("h2o_feet")
 // ...
 influxDB.write(batchPoints);
 // ...
-QueryResult queryResult = influxDB.query(new Query("SELECT * FROM h2o_feet"), databaseName);
+QueryResult queryResult = influxDB.query(new Query("SELECT * FROM h2o_feet", databaseName));
 // ...
 influxDB.close();
 ```