Update lock thread action timing

We're sometimes observing failures from this action and from the issue
below it seems like using a different random time might solve this.

dessant/lock-threads#48

.github/workflows/lock.yml

@@ -2,7 +2,7 @@ name: 'Lock Threads'
 
 on:
   schedule:
-    - cron: '0 0 * * *'
+    - cron: '33 2 * * *'
   workflow_dispatch:
 
 permissions: