switch to update-flake-inputs actions to get auto-merge

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

@@ -0,0 +1,29 @@
+name: Update Flake Inputs
+on:
+  schedule:
+    - cron: "0 2 * * 0"
+  workflow_dispatch:
+jobs:
+  update-flake-inputs:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - name: Generate GitHub App Token
+        id: app-token
+        uses: actions/create-github-app-token@v2
+        with:
+          app-id: ${{ vars.CI_APP_ID }}
+          private-key: ${{ secrets.CI_APP_PRIVATE_KEY }}
+      - name: Checkout repository
+        uses: actions/checkout@v5
+        with:
+          token: ${{ steps.app-token.outputs.token }}
+      - name: Setup Nix
+        uses: cachix/install-nix-action@v31
+      - name: Update flake inputs
+        uses: mic92/update-flake-inputs@main
+        with:
+          github-token: ${{ steps.app-token.outputs.token }}
+          auto-merge: true

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

@@ -1,34 +0,0 @@
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: "0 0 * * 1,4" # Run twice a week
-permissions:
-  pull-requests: write
-  contents: write
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v5
-      - name: Install Nix
-        uses: cachix/install-nix-action@v31
-        with:
-          github_access_token: ${{ secrets.GITHUB_TOKEN }}
-      - uses: actions/create-github-app-token@v2
-        id: app-token
-        with:
-          app-id: ${{ vars.CI_APP_ID }}
-          private-key: ${{ secrets.CI_APP_PRIVATE_KEY }}
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v27
-        with:
-          token: ${{ steps.app-token.outputs.token }}
-          pr-body: |
-            Automated changes by the update-flake-lock
-            ```
-            {{ env.GIT_COMMIT_MESSAGE }}
-            ```
-          pr-labels: | # Labels to be set on the PR
-            auto-merge