update-readme.yml

name: Update README with Last Update Timestamp

on:
  schedule:
    - cron: '0 * * * *'
  workflow_dispatch:

jobs:
  update-readme:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set current date and time
        id: datetime
        run: echo "CURRENT_DATE=$(date -u +"%Y-%m-%d %H:%M:%S UTC")" >> $GITHUB_ENV

      - name: Update README.md
        run: |
          # Check if the line exists and replace it, otherwise add it
          if grep -q "Last updated:" README.md; then
            sed -i "s|Last updated:.*|Last updated: $CURRENT_DATE|" README.md
          else
            echo -e "\nLast updated: $CURRENT_DATE" >> README.md
          fi

      - name: Commit changes
        run: |
          git config user.name "GitHub Action"
          git config user.email "action@github.com"
          git add README.md
          git commit -m "Update README with last update timestamp"
          git push