ci: fix flake update action

.github/workflows/flake-update.yml

@@ -1,19 +1,21 @@
-name: flake update
-
-# Controls when the workflow will run
+name: update-flake-lock
 on:
-  schedule: 
-  - cron: "0 0 * * 1"
-
-  workflow_dispatch:
+  workflow_dispatch: 
+  schedule:
+    - cron:  '00 00 * * 6'
 
 jobs:
-  build:
+  lockfile:
     runs-on: ubuntu-latest
-
     steps:
-      - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v13
-      - uses: DeterminateSystems/magic-nix-cache-action@v6
-      - name: Update Nix Flake Lock
-        uses: DeterminateSystems/update-flake-lock@v21
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Update flake.lock
+        uses: DeterminateSystems/update-flake-lock@main
+        with:
+          pr-title: "Update flake.lock" 
+          pr-labels: |                  
+            dependencies
+            automated