Update flake.lock (#30)

Automated changes by the
[update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock)
GitHub Action.

```
Flake lock file updates:

• Updated input 'flaky':
    'github:sellout/flaky/b0878161d1ceb2cc70c120e8e057c51361e04f85' (2023-12-27)
  → 'github:sellout/flaky/b48abdadd47782b310c9e6efcfcf9d6d99f54442' (2024-01-03)
• Updated input 'flaky/bash-strict-mode':
    'github:sellout/bash-strict-mode/e90ce930e32b766a87b738612925d86878671e3a' (2023-12-13)
  → 'github:sellout/bash-strict-mode/f0d0c30a2a7eaf4e9c3f4dad4c674c5e9bd38bda' (2023-12-31)
• Updated input 'flaky/home-manager':
    'github:nix-community/home-manager/6761b8188b860f374b457eddfdb05c82eef9752f' (2023-12-10)
  → 'github:nix-community/home-manager/d5824a76bc6bb93d1dce9ebbbcb09a9b6abcc224' (2023-12-23)
• Updated input 'flaky/project-manager':
    'github:sellout/project-manager/d146c153ad35040bcf666798a4d18ee045ae9daf' (2023-12-06)
  → 'github:sellout/project-manager/539a7b9799692fa4481373aedae530ddbc78822b' (2023-12-31)
• Updated input 'flaky/project-manager/nixpkgs-23_05':
    'github:NixOS/nixpkgs/6386d8aafc28b3a7ed03880a57bdc6eb4465491d' (2023-12-02)
  → 'github:NixOS/nixpkgs/0aad9113182747452dbfc68b93c86e168811fa6c' (2023-12-30)
• Updated input 'flaky/project-manager/nixpkgs-23_11':
    'github:NixOS/nixpkgs/9b1832351c5cce688162ca401a92e72fd50514e4' (2023-12-02)
  → 'github:NixOS/nixpkgs/41dda835e2bce1270e837d9b5eaa5f78404aa45e' (2023-12-30)
• Updated input 'flaky/project-manager/nixpkgs-unstable':
    'github:NixOS/nixpkgs/f5c27c6136db4d76c30e533c20517df6864c46ee' (2023-11-30)
  → 'github:NixOS/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870' (2023-12-25)
• Updated input 'flaky/project-manager/treefmt-nix':
    'github:numtide/treefmt-nix/e82f32aa7f06bbbd56d7b12186d555223dc399d1' (2023-11-12)
  → 'github:numtide/treefmt-nix/2961375283668d867e64129c22af532de8e77734' (2023-12-19)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/41dda835e2bce1270e837d9b5eaa5f78404aa45e' (2023-12-30)
  → 'github:NixOS/nixpkgs/36f6a9680b22b693907680c65694ac58e003f0c3' (2024-01-06)
```

### 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:

```sh
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
```