update-flack-lock action -> renovate

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

@@ -1,23 +0,0 @@
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 1,4' # Run twice a week
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: cachix/install-nix-action@v23
-        with:
-          extra_nix_config: |
-            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
-        with:
-          token: ${{ secrets.GH_TOKEN_FOR_UPDATES }}
-          pr-labels: |                  # Labels to be set on the PR
-            merge-queue

.mergify.yml

@@ -1,13 +1,8 @@
 queue_rules:
   - name: default
     merge_conditions:
-      - check-success=Evaluate flake.nix
-      - check-success=check treefmt [x86_64-linux]
-      - check-success=devShell default [x86_64-linux]
-      - check-success=package default [x86_64-linux]
-      - check-success=package nix-eval-jobs [x86_64-linux]
-      - check-success=tests (macos-latest)
-      - check-success=tests (ubuntu-latest)
+      - author=renovate[bot]
+      - check-success=collect
 defaults:
   actions:
     queue:

renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "lockFileMaintenance": {
+    "enabled": true,
+    "extends": [
+      "schedule:weekly"
+    ]
+  },
+  "nix": {
+    "enabled": true
+  }
+}