flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/3f7172646953bf86dad5953bc45f0edae62ac445' (2022-12-18)
  → 'github:hercules-ci/flake-parts/82c16f1682cf50c01cb0280b38a1eed202b3fe9f' (2023-01-10)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/eb37a7f66312e845fba0b3cc7c36e727012b3dae' (2022-12-20)
  → 'github:NixOS/nixpkgs/81aef2338a3834f4d0071978dbc114497ec56a7e' (2023-01-17)

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1671322946,
-        "narHash": "sha256-J8Qj+ITV+eti+irTK9Zn2LZVYoIW2g7irPUckU8yZvU=",
+        "lastModified": 1673362319,
+        "narHash": "sha256-Pjp45Vnj7S/b3BRpZEVfdu8sqqA6nvVjvYu59okhOyI=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "3f7172646953bf86dad5953bc45f0edae62ac445",
+        "rev": "82c16f1682cf50c01cb0280b38a1eed202b3fe9f",
         "type": "github"
       },
       "original": {
@@ -22,11 +22,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1671537075,
-        "narHash": "sha256-lAejYRUtM2SDTmHxcFLnx4W/P0URejhkl9DyqJ++PIc=",
+        "lastModified": 1673944933,
+        "narHash": "sha256-yrWHhOj7BwY/dbQ+Ifhanm/IZ6qWerZiGmFbmt0/wMU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "eb37a7f66312e845fba0b3cc7c36e727012b3dae",
+        "rev": "81aef2338a3834f4d0071978dbc114497ec56a7e",
         "type": "github"
       },
       "original": {