legado/.github/workflows/workflow.yml

name: delete old workflows

on: 
  schedule:
    - cron: '0 16 0/7 * *'

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Delete workflow runs
        uses: Mattraks/delete-workflow-runs@v2
        continue-on-error: true
        with:
          token: ${{ github.token }}
          repository: ${{ github.repository }}
          retain_days: 30
          keep_minimum_runs: 30