Merge pull request #23 from fastapi-mvc/dependabot/github_actions/cachix/install-nix-action-21

Bump cachix/install-nix-action from 20 to 21

Author: rszamszur

.github/workflows/main.yml

@@ -47,7 +47,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix ❄️
-        uses: cachix/install-nix-action@v20
+        uses: cachix/install-nix-action@v21
         with:
           nix_path: ${{ env.NIX_CHANNEL }}
           install_url: ${{ env.NIX_INSTALL_URL }}