add scheduled executions

.github/workflows/crawl.yml

@@ -1,7 +1,6 @@
 on:
-  # TODO enable scheduled execution
-  # schedule:
-  #  - cron: 0/5 * * * *
+  schedule:
+    - cron: "0 0 * * *"
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -16,6 +15,8 @@ jobs:
       - name: Crawl information about public sites
         run: $GITHUB_WORKSPACE/crawl.sh
 
+      # The resulting commit will not trigger another GitHub Actions Workflow run.
+      # This is due to limitations set by GitHub.
       - uses: stefanzweifel/git-auto-commit-action@v4
         with:
           commit_message: Update information about public sites

.github/workflows/web_build.yml

@@ -1,4 +1,7 @@
 on:
+  schedule:
+    - cron: "0 1 * * *"
+
   push:
     branches:
       - main