• First you need to disable the auto deploy option in your render app settings. Settings > Build and Deploy > Auto-Deploy.
• Add your service id and your render api key to your GitHub repository secrets. Settings > Secrets > Actions.
• Add this action to your pipeline.

steps:
    - uses: actions/checkout@v3
    - uses: JorgeLNJunior/render-deploy@v1.2.2
      with:
        service_id: ${{ secrets.RENDER_SERVICE_ID }} # required
        api_key: ${{ secrets.RENDER_API_KEY }} # required
        clear_cache: false # optional

Project under MIT » license.