Update check_and_update_json_date.yml

.github/workflows/check_and_update_json_date.yml

@@ -5,6 +5,9 @@ on:
     types: [synchronize, opened, reopened, edited]
     paths:
     - "json/*.json"
+  schedule:
+    - cron: "0 0,6,12,18 * * *" 
+  workflow_dispatch:
 
 jobs:
   update-date:
@@ -13,6 +16,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.ref }} 
 
       - name: Set up Python
         uses: actions/setup-python@v4
@@ -43,3 +48,23 @@ jobs:
         uses: ad-m/github-push-action@v0.6.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
+
+  iterate-prs:
+    needs: update-date
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install GitHub CLI
+        run: sudo apt-get install -y gh
+
+      - name: List all open PRs
+        run: |
+          gh pr list --state open --json number,title > pr_list.json
+          jq -r '.[] | .number' pr_list.json > pr_numbers.txt
+
+      - name: Process each PR
+        run: |
+          while read pr_number; do
+            gh pr checkout $pr_number
+            git fetch origin
+            git checkout origin/$pr_number
+          done < pr_numbers.txt