build: bump cachix/install-nix-action from 20 to 21

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 20 to 21.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](https://github.com/cachix/install-nix-action/compare/v20...v21)

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

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

diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index e0d6e652b61676bf0c2515e848c9464a91e6551e..683bc6cd982ea31836c78d1d845ef6fddf674bff 100644 (file)
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v21
       - name: Check Python/C style
         run: |
           nix develop --command ci-helper format-c format-python