Merge pull request #104 from ledger/dependabot/github_actions/cachix/install-nix-action-31

Author: afh

.github/workflows/build_and_deploy.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: Build website