message: Rename SystemMsg -> SudoMsg in schema
diff: @@ -5,7 +5,7 @@ use cosmwasm_schema::{export_schema, remove_schemas, schema_for};
  use cosmwasm_std::BalanceResponse;
  use hackatom::contract::{
  - ExecuteMsg, InitMsg, MigrateMsg, QueryMsg, State, SystemMsg, VerifierResponse,
  + ExecuteMsg, InitMsg, MigrateMsg, QueryMsg, State, SudoMsg, VerifierResponse,
  };
  fn main() {
  @@ -17,7 +17,7 @@ fn main() {
  export_schema(&schema_for!(InitMsg), &out_dir);
  export_schema(&schema_for!(ExecuteMsg), &out_dir);
  export_schema(&schema_for!(MigrateMsg), &out_dir);
  - export_schema(&schema_for!(SystemMsg), &out_dir);
  + export_schema(&schema_for!(SudoMsg), &out_dir);
  export_schema(&schema_for!(QueryMsg), &out_dir);
  export_schema(&schema_for!(State), &out_dir);
  export_schema(&schema_for!(VerifierResponse), &out_dir);
  