flake.lock: update zellij

[a-kenji-buildbot]

Automated changes by the update-flake-lock GitHub Action.

Flake lock file updates:

• Updated input 'zellij':
    'github:zellij-org/zellij/64a5ac095ce3c85ef0b63a4ccd47bbf6ec828bef' (2024-05-18)
  → 'github:zellij-org/zellij/c72f3a712bfa92a4a80b4c1ad1dbe7669892a324' (2024-05-22)

Running GitHub Actions on this PR

GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.

To run GitHub Actions workflows on this PR, run:

git branch -D update_flake_lock_action
git fetch origin
git checkout update_flake_lock_action
git commit --amend --no-edit
git push origin update_flake_lock_action --force