Tweak first release newlines in changelog

.ci/mknotes

@@ -77,6 +77,7 @@ sub run {
  }
  # Reach the end of the file; must be the first release. Diff the
  # initial commit.
+ print {$out} "\n\n";
  return $self->finish_list($out, $self->initial_commit);
  }
  }