chore(deps): bump nixpkgs from 151fa4e to 7fd4004 in /nix

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `151fa4e` to `7fd4004`.
- [Commits](https://github.com/NixOS/nixpkgs/compare/151fa4e8ddfdd8dd25d945ad94ed54a13de9f6e4...7fd4004d0511991fff3a0524856a9be09e28c5f0)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: 7fd4004d0511991fff3a0524856a9be09e28c5f0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

nix/flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1791260994,
-        "narHash": "sha256-Miqqk/ammqnTUxaoCyvtwoPeLbI1ksFyLxi/CazZpWY=",
+        "lastModified": 1791734076,
+        "narHash": "sha256-i5qk1kLiit98rRbh1AXmWBNT9QXC/y4l5Wk/u5EdpDQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "151fa4e8ddfdd8dd25d945ad94ed54a13de9f6e4",
+        "rev": "7fd4004d0511991fff3a0524856a9be09e28c5f0",
         "type": "github"
       },
       "original": {