chore: update git-cipher submodule
chore: update git-cipher submodule

* vendor/git-cipher 598ccb8...8001e1d (12):
  > style: improve the appearance of demo output
  > feat: handle repos without commits a bit better
  > fix: don't `add` unless repo is ready
  > fix: always run `yarn` commands from the repo root
  > feat: add mechanism for including docs in other docs
  > refactor: remove another stale comment
  > docs: add links to subcommand documentation
  > docs: remove mention of command I won't be implementing
  > refactor: remove stale comment
  > feat: show usage info when `--help` is passed
  > feat(unlock): teach `unlock` to alert when `init` needs to be run
  > fix: fix failure due to bootstrap due to ordering

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent