tldr/.github/workflows/copy-release-assets.yml

name: Copy assets to the new release

on:
  release:
    types: published

permissions:
  contents: write

env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

jobs:
  release:
    name: Copy assets to the new release
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Download and upload
        run: |
          LATEST="$(git describe --tags --abbrev=0)"
          PREVIOUS="$(git describe --tags --abbrev=0 "$LATEST"^)"

          mkdir release-assets && cd release-assets

          gh release download "$PREVIOUS"
          gh release upload "$LATEST" -- *