Fix Windows Nightly CI failure in release-drafter config loading

[Copilot]

The Windows job in the Nightly workflow failed before build/test due to release-drafter not resolving its config on the runner (.github\release-drafter.yml fallback path ended in 404). This PR makes config loading deterministic on Windows by using the checked-out workspace file.

• Workflow ordering

  • Move actions/checkout before release-drafter so local config is guaranteed to exist when invoked.

• Release-drafter config source

  • Set release-drafter to load from local filesystem (file: scheme) instead of remote resolution/fallback.

steps:
  - uses: actions/checkout@v7
    with:
      submodules: recursive

  - name: Update draft on GitHub Releases
    uses: release-drafter/release-drafter@v7
    with:
      config-name: file:.github/release-drafter.yml