message: Fix metadata generation for multisig example
diff: @@ -107,6 +107,7 @@ mod multisig_plain {
  /// Indicates whether a transaction is already confirmed or needs further confirmations.
  #[derive(scale::Encode, scale::Decode, Clone, Copy)]
  + #[cfg_attr(feature = "ink-generate-abi", derive(type_metadata::Metadata))]
  pub enum ConfirmationStatus {
  /// The transaction is already confirmed.
  Confirmed,
  