DOI found for unpublished results

[github-actions]

Hi there, I found some papers which are listed as unpublished, but which now have a DOI. Please check the list below and mark the ones which are correct. Add the label 'food for arxivbot' when you are done and I will take care of the rest. Here we go:

• ID: SterckEtAl2024b
  Current title: Parallel-in-time solution of hyperbolic PDE systems via characteristic-variable block preconditioning
  Crossref title: Parallel-in-Time Solution of Hyperbolic PDE Systems via Characteristic-Variable Block Preconditioning
  DOI: https://doi.org/10.1137/24m1673310

• ID: AppelEtAl2025
  Current title: Space-Time Multigrid Methods Suitable for Topology Optimisation of Transient Heat Conduction
  Crossref title: Space-Time Multigrid Methods Suitable for Topology Optimisation of Transient Heat Conduction
  DOI: https://doi.org/10.2139/ssrn.5256438

[github-actions]

Working on SterckEtAl2024b with URL https://doi.org/10.1137/24m1673310