update nix in CI workflow update-version.yml

Author: juliankuners

.github/workflows/update-version.yml

@@ -27,9 +27,9 @@ jobs:
           git config user.name devops
           git config user.email devops@runtimeverification.com
       - name: 'Install Nix'
-        uses: cachix/install-nix-action@v22
+        uses: cachix/install-nix-action@v31.5.1
         with:
-          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
+          install_url: https://releases.nixos.org/nix/nix-2.30.1/install
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
             substituters = http://cache.nixos.org https://hydra.iohk.io