build(deps): bump AtomiCloud/actions.setup-nix from 1.1.0 to 1.2.1

Bumps [AtomiCloud/actions.setup-nix](https://github.com/atomicloud/actions.setup-nix) from 1.1.0 to 1.2.1.
- [Release notes](https://github.com/atomicloud/actions.setup-nix/releases)
- [Changelog](https://github.com/AtomiCloud/actions.setup-nix/blob/main/Changelog.md)
- [Commits](AtomiCloud/actions.setup-nix@v1.1.0...v1.2.1)

---
updated-dependencies:
- dependency-name: AtomiCloud/actions.setup-nix
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/ci.yaml

@@ -26,7 +26,7 @@ jobs:
       - nscloud-git-mirror-1gb
     steps:
       # Setup
-      - uses: AtomiCloud/actions.setup-nix@v1.1.0
+      - uses: AtomiCloud/actions.setup-nix@v1.2.1
       - uses: AtomiCloud/actions.cache-bun@v1.0.1
 
       # Action
@@ -95,7 +95,7 @@ jobs:
       - nscloud-git-mirror-1gb
     steps:
       # Setup
-      - uses: AtomiCloud/actions.setup-nix@v1.1.0
+      - uses: AtomiCloud/actions.setup-nix@v1.2.1
 
       # Action
       - uses: rlespinasse/github-slug-action@v3.x
@@ -125,7 +125,7 @@ jobs:
       - nscloud-git-mirror-1gb
     steps:
       # Setup
-      - uses: AtomiCloud/actions.setup-nix@v1.1.0
+      - uses: AtomiCloud/actions.setup-nix@v1.2.1
       - uses: AtomiCloud/actions.cache-npm@v1.0.1
 
       # Action