Fix Action config issues (#189)

Author: lucperkins

.github/workflows/update-flake-lock.yaml

@@ -10,9 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@main
-        with:
-          determinate: true
+      - uses: DeterminateSystems/determinate-nix-action@main
       - uses: DeterminateSystems/flakehub-cache-action@main
       - uses: DeterminateSystems/update-flake-lock@main
         with:

.github/workflows/update.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Check flake
-        uses: DeterminateSystems/flake-checker-action
+        uses: DeterminateSystems/flake-checker-action@main
         with:
           fail-mode: true
       - name: Install Determinate Nix