Run full check nightly

Author: robtaylor

.github/workflows/main.yaml

@@ -4,6 +4,8 @@ on:
       - main
   pull_request:
   merge_group:
+  schedule:
+    - cron: '0 0 * * *'  # Every day at midnight UTC
 
 name: CI
 jobs:
@@ -88,7 +90,7 @@ jobs:
           fetch-depth: 0
           path: chipflow-lib
       - name: Check out chipflow-examples
-        uses: actions/checkout@v4
+       uses: actions/checkout@v4
         with:
           repository: ChipFlow/chipflow-examples
           fetch-depth: 0