chore(deps): bump nixpkgs from b7c2ada to 2fcb964 in /nix (#5939)

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `b7c2ada` to `2fcb964`.
- [Commits](https://github.com/NixOS/nixpkgs/compare/b7c2ada94fe99c15b0dbcf4d11fd7850b957a436...2fcb964de67fcf60b43471c55d5d99e61a9ccb5a)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: 2fcb964de67fcf60b43471c55d5d99e61a9ccb5a
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

nix/flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1785967620,
-        "narHash": "sha256-IItrdb7Puk05RqOBWZYFC5X6Wl1sJmCfh5MWVHw5iMM=",
+        "lastModified": 1786599213,
+        "narHash": "sha256-yNJd40f11EzXBjSByCB7IPpeFFAdeoSKKM67dGkfFoU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b7c2ada94fe99c15b0dbcf4d11fd7850b957a436",
+        "rev": "0e251e24a4f24e036a084b6b4b2d2491af4167f4",
         "type": "github"
       },
       "original": {