chore: switch lock app to action (#8022)

.github/lock.yml

-# Github Lock App configuration
-# https://github.com/apps/lock
-
-# Do not comment on very old issues / prs
-lockComment: false
-
-# Only process issues / prs older than 2 years
-daysUntilLock: 730
-
-# Assign `resolved` as the reason for locking.
-setLockReason: true
-
-# other config
-skipCreatedBefore: false
-lockLabel: false

.github/workflows/lock.yml

+name: lock-threads
+
+on:
+  # run daily
+  schedule:
+    - cron: '0 0 * * *'
+
+  # allow manual trigger
+  workflow_dispatch:
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v2.0.1
+        if: github.repository == 'renovatebot/renovate'
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: 730
+          pr-lock-inactive-days: 730