chore(deps): bump nixpkgs from 0e251e2 to ec2d622 in /nix (#5968)

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `0e251e2` to `ec2d622`.
- [Commits](https://github.com/NixOS/nixpkgs/compare/0e251e24a4f24e036a084b6b4b2d2491af4167f4...ec2d622de0773551768cf98f3fc50cbcc003b9c5)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: ec2d622de0773551768cf98f3fc50cbcc003b9c5
  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": 1786599213,
-        "narHash": "sha256-yNJd40f11EzXBjSByCB7IPpeFFAdeoSKKM67dGkfFoU=",
+        "lastModified": 1787135253,
+        "narHash": "sha256-RD2kNWCG+Bjo6h+JVjWVNntZs2GtRoeY2xHjts/FNkA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0e251e24a4f24e036a084b6b4b2d2491af4167f4",
+        "rev": "ffb3c9b700e759be2ef13237c9d8f953b32a1e46",
         "type": "github"
       },
       "original": {