Merge pull request #1873 from haskell/dependabot/github_actions/cachix/install-nix-action-31

chore(deps): bump cachix/install-nix-action from 30 to 31

Author: purcell

.github/workflows/test.yml

@@ -29,7 +29,7 @@ jobs:
           - emacs_version: 29.4
             target: deploy-manual
     steps:
-    - uses: cachix/install-nix-action@v30
+    - uses: cachix/install-nix-action@v31
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: purcell/setup-emacs@master