flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.859555%2Brev-ab0f3607a6c7486ea22229b92ed2d355f1482ee0/01993860-4c2b-73a3-9c67-955d87cd3025/source.tar.gz?narHash=sha256-zwE/e7CuPJUWKdvvTCB7iunV4E/%2BG0lKfv4kk/5Izdg%3D' (2025-09-10)
  → 'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.878042%2Brev-544961dfcce86422ba200ed9a0b00dd4b1486ec5/0199ea66-30cf-75ea-9291-792c21aea771/source.tar.gz?narHash=sha256-EVAqOteLBFmd7pKkb0%2BFIUyzTF61VKi7YmvP1tw4nEw%3D' (2025-10-15)

flake.lock

@@ -2,12 +2,12 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1757487488,
-        "narHash": "sha256-zwE/e7CuPJUWKdvvTCB7iunV4E/+G0lKfv4kk/5Izdg=",
-        "rev": "ab0f3607a6c7486ea22229b92ed2d355f1482ee0",
-        "revCount": 859555,
+        "lastModified": 1760524057,
+        "narHash": "sha256-EVAqOteLBFmd7pKkb0+FIUyzTF61VKi7YmvP1tw4nEw=",
+        "rev": "544961dfcce86422ba200ed9a0b00dd4b1486ec5",
+        "revCount": 878042,
         "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.859555%2Brev-ab0f3607a6c7486ea22229b92ed2d355f1482ee0/01993860-4c2b-73a3-9c67-955d87cd3025/source.tar.gz"
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.878042%2Brev-544961dfcce86422ba200ed9a0b00dd4b1486ec5/0199ea66-30cf-75ea-9291-792c21aea771/source.tar.gz"
       },
       "original": {
         "type": "tarball",