regen workflow

Author: jkuball

.github/workflows/book.yaml

@@ -11,7 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: nixbuild/nix-quick-install-action@v29
+    - uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
     - run: nix develop .#book -c mdbook build ./.
     - if: ${{ github.ref == 'refs/heads/main' }}
       uses: actions/upload-pages-artifact@v3