Set autoloop schedule to 30 minutes

Co-authored-by: mrjf <180956+mrjf@users.noreply.github.com>

Author: Copilot

.github/workflows/autoloop.lock.yml

@@ -11,7 +11,7 @@ description: |
   - Maintains a single draft PR per program that accumulates all accepted iterations
 
 on:
-  schedule: every 6h
+  schedule: every 30m
   workflow_dispatch:
     inputs:
       program: