chore(deps): bump devenv from `863b420` to `c873d21` (#21820)

Bumps [devenv](https://github.com/cachix/devenv) from `863b420` to `c873d21`.
- [Release notes](https://github.com/cachix/devenv/releases)
- [Commits](863b420472...c873d21f80)

---
updated-dependencies:
- dependency-name: devenv
  dependency-version: c873d21f80b6b43f121258f5e6fd3b34afa7b930
  dependency-type: direct:production
...

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

flake.lock

@@ -163,11 +163,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1776863933,
-        "narHash": "sha256-v9NoQFSln9n5zqVWUWUc9PajsMaGmga51HOAJqMx7Qw=",
+        "lastModified": 1776968239,
+        "narHash": "sha256-4kuGE6iwtCrd6BsGMvLBis8Bbn04c0V5T1Yt6Tmmtyc=",
         "owner": "cachix",
         "repo": "devenv",
-        "rev": "863b4204725efaeeb73811e376f928232b720646",
+        "rev": "c873d21f80b6b43f121258f5e6fd3b34afa7b930",
         "type": "github"
       },
       "original": {