build(deps): bump cachix/install-nix-action from 31.6.0 to 31.6.1

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 31.6.0 to 31.6.1.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Changelog](https://github.com/cachix/install-nix-action/blob/master/RELEASE.md)
- [Commits](56a7bb7b56...7be5dee142)

---
updated-dependencies:
- dependency-name: cachix/install-nix-action
  dependency-version: 31.6.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
(cherry picked from commit c4fd1f6500)

.github/workflows/build.yml

@@ -52,7 +52,7 @@ jobs:
         with:
           merged-as-untrusted-at: ${{ inputs.mergedSha }}
 
-      - uses: cachix/install-nix-action@56a7bb7b56d9a92d4fd1bc05758de7eea4a370a8 # v31
+      - uses: cachix/install-nix-action@7be5dee1421f63d07e71ce6e0a9f8a4b07c2a487 # v31
         with:
           # Sandbox is disabled on MacOS by default.
           extra_nix_config: sandbox = true