message: fix: during_hardfork comment
diff: @@ -187,7 +187,7 @@ impl ForkChanges {
  if blocks.is_empty() {
  false
  } else {
  - // This method assumes that the hardfork epochs are sorted and unique.
  + // This method assumes that the input blocks are sorted and unique.
  let hardfork_epochs = hardfork_switch.script_result_changed_at();
  if hardfork_epochs.is_empty() {
  false
  