message: Move docs on BatchQuery::values onto QueryValues::NamedValues
diff: @@ -145,10 +145,8 @@ pub struct BatchQuery {
  pub is_prepared: bool,
  /// Contains either id of prepared query or a query itself.
  pub subject: BatchQuerySubj,
  - /// It is the optional name of the following <value_i>. It must be present
  - /// if and only if the 0x40 flag is provided for the batch.
  - /// **Important note:** this feature does not work and should not be
  - /// used. It is specified in a way that makes it impossible for the server
  + /// **Important note:** QueryValues::NamedValues does not work and should not be
  + /// used for batches. It is specified in a way that makes it impossible for the server
  /// to implement. This will be fixed in a future version of the native
  /// protocol. See <https://issues.apache.org/jira/browse/CASSANDRA-10246> for
  /// more details
  