Adds github action to update flake.lock

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

@@ -0,0 +1,21 @@
+name: update-flake-lock
+on:
+  workflow_dispatch: # allows manual triggering
+  schedule:
+    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
+
+jobs:
+  lockfile:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - 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" # Title of PR to be created
+          pr-labels: |                  # Labels to be set on the PR
+            dependencies
+            automated

flake.nix

@@ -101,7 +101,7 @@
         packages.x86_64-linux.live-image = self.nixosConfigurations.x86_64-live.config.system.build.isoImage;
         packages.aarch64-linux.live-image = self.nixosConfigurations.x86_64-live.config.system.build.isoImage;
 
-        checks.x86_64-linux.nixbox = self.nixosConfigurations.nixbox.config.system.build.topLevel;
+        checks.x86_64-linux.nixbox = self.nixosConfigurations.nixbox.config.system.build.toplevel;
 
         githubActions = nix-github-actions.lib.mkGithubMatrix {
           checks = nixpkgs.lib.getAttrs ["x86_64-linux" "x86_64-darwin"] self.checks;