Lock threads that have been closed (#22)

Signed-off-by: David Calavera <david.calavera@gmail.com>

.github/workflows/lock.yml

@@ -0,0 +1,19 @@
+name: 'Lock Threads'
+
+on:
+  schedule:
+    - cron: '0 * * * *'
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+concurrency:
+  group: lock
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v4