chore(deps): bump nixpkgs from 34ab990 to dc5d91f in /nix (#6028)

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `34ab990` to `dc5d91f`.
- [Commits](34ab99075a...dc5d91f840)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: dc5d91f840324650bac8c379428c7037a416959a
  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": 1788179007,
-        "narHash": "sha256-hn1oU2rue2SYK8dAr8+WNZWtbsz1S2W5mnHlSEuh3bo=",
+        "lastModified": 1788752844,
+        "narHash": "sha256-VaWGJ6+cIYN2erfSecbRV+4ljI185Ty2wUrXyvQbgOw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "34ab99075ac4f7e40cf037eef32cb1c360bb85e9",
+        "rev": "dc5d91f840324650bac8c379428c7037a416959a",
         "type": "github"
       },
       "original": {