chore(deps): update determinatesystems/nix-installer-action action to v19 (#51)

Author: renovate[bot]

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v18
+      - uses: DeterminateSystems/nix-installer-action@v19
       - uses: cachix/cachix-action@v16
         with:
           name: recap