Fix example to close the rows object

en/05.2.md

@@ -80,6 +80,8 @@ The following example shows how to operate on a database based on the `database/
 	        fmt.Println(department)
 	        fmt.Println(created)
 	    }
+	    
+	    rows.Close()
 	
 	    // delete
 	    stmt, err = db.Prepare("delete from userinfo where uid=?")