flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3d8f0f3' (2026-05-23)
  → 'github:nixos/nixpkgs/335f073' (2026-07-24)

flake.lock

@@ -40,11 +40,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1779536132,
+        "lastModified": 1784872115,
-        "narHash": "sha256-q+fF42iv/geEbHfgSzy3tS0FF/EyD6XTZ98E6yxiBO8=",
+        "narHash": "sha256-THPEF2po0fsoH8gNtp+Ae0XFDJH3N/ol7xO3v6VMTJU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3d8f0f3f72a6cd4d93d0ad13203f2ea1cb7e1456",
+        "rev": "335f0738cb2fa9708f3f428e39d2eae975d1338d",
         "type": "github"
       },
       "original": {