Create lock-closed-issues.yml

Signed-off-by: René Gieling <github@dartcafe.de>

.github/workflows/lock-closed-issues.yml

@@ -0,0 +1,25 @@
+name: 'Lock Issues'
+
+on:
+  schedule:
+    - cron: '2 1 * * *'
+
+concurrency: lock_issues
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v5
+        with:
+          github-token: ${{ github.token }}
+          issue-inactive-days: '31'
+          exclude-issue-created-before: ''
+          exclude-any-issue-labels: ''
+          add-issue-labels: ''
+          issue-comment: >
+            This thread has been automatically locked since there has not been
+            any recent activity after it was closed. Please open a new issue for
+            related bugs.
+          issue-lock-reason: 'resolved'
+          process-only: 'issues'