update_submodules.yml

name: 'Submodules sync'

on:
  workflow_dispatch:
  schedule:
    # Run once per day
    - cron: '0 3 * * *'

jobs:
  sync:
    name: 'Submodules sync'
    runs-on: ubuntu-latest

    defaults:
      run:
        shell: bash

    steps:
    - name: Checkout
      uses: actions/checkout@v3
      with:
        submodules: recursive

    - name: Git submodule Update
      run: |
        git pull --recurse-submodules
        git submodule update --remote --recursive

    - name: Add and commit
      uses: EndBug/add-and-commit@v9
      with:
        message: Submodules sync