flake: update the lock (#110)

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

```
Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2?narHash=sha256-Dt/wOWeW6Sqm11Yh%2B2%2Bt0dfEWxoMxGBvv3JpIocFl9E%3D' (2024-03-01)
  → 'github:hercules-ci/flake-parts/9126214d0a59633752a136528f5f3b9aa8565b7d?narHash=sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm%2BGpZNw%3D' (2024-04-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/1536926ef5621b09bba54035ae2bb6d806d72ac8?dir=lib&narHash=sha256-cy6ArO4k5qTx%2Bl5o%2B0mL9f5fa86tYUX3ozE1S%2BTxlds%3D' (2024-02-29)
  → 'github:NixOS/nixpkgs/d8fe5e6c92d0d190646fb9f1056741a229980089?dir=lib&narHash=sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk%3D' (2024-03-29)
• Updated input 'home-manager':
    'github:nix-community/home-manager/820be197ccf3adaad9a8856ef255c13b6cc561a6?narHash=sha256-co6LoFA%2Bj6BZEeJNSR8nZ4oOort5qYPskjrDHBaJgmo%3D' (2024-03-31)
  → 'github:nix-community/home-manager/1451d2866d9ef3739c20f964c9c8bd6db39cc373?narHash=sha256-bRcvw%2BarBwpRzqpZQxyB1pCaq1TJXhnx4f294hMXkm4%3D' (2024-04-22)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d8fe5e6c92d0d190646fb9f1056741a229980089?narHash=sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk%3D' (2024-03-29)
  → 'github:NixOS/nixpkgs/6143fc5eeb9c4f00163267708e26191d1e918932?narHash=sha256-%2Bz/XjO3QJs5rLE5UOf015gdVauVRQd2vZtsFkaXBq2Y%3D' (2024-04-21)
• Updated input 'nur':
    'github:nix-community/NUR/e4f401a895618fe76b00d9843cec396212d92af3?narHash=sha256-Ba7wf5sRvWy5q390PVUjmU3HlPWcxKW03GqhUiSjWIA%3D' (2024-04-01)
  → 'github:nix-community/NUR/c94f2b409fde98e22b2155a4709828ccd4bf9935?narHash=sha256-kVSXGAWW7Ho26DTEtjof4JhX0MAvMZH4Jqjtx4/4QyQ%3D' (2024-04-22)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/99b1e37f9fc0960d064a7862eb7adfb92e64fa10?narHash=sha256-HxegAPnQJSC4cbEbF4Iq3YTlFHZKLiNTk8147EbLdGg%3D' (2024-03-31)
  → 'github:Mic92/sops-nix/4371a1301c4d36cc791069d90ae522613a3a335e?narHash=sha256-xyP8h9jLQ0AmyPy40sIwL7/D03oVpXG9YHoYJ4ecYWA%3D' (2024-04-22)
• Updated input 'sops-nix/nixpkgs-stable':
    'github:NixOS/nixpkgs/2b4e3ca0091049c6fbb4908c66b05b77eaef9f0c?narHash=sha256-tNeB6emxj74Y6ctwmsjtMlzUMn458sBmwnD35U5KIM4%3D' (2024-03-30)
  → 'github:NixOS/nixpkgs/74574c38577914733b4f7a775dd77d24245081dd?narHash=sha256-q7APLfB6FmmSMI1Su5ihW9IwntBsk2hWNXh8XtSdSIk%3D' (2024-04-20)
```

### 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
```