dl.openfoam.com is rejecting requests from GitHub Actions

The dl.openfoam.com site seems to be rejecting requests originating from GitHub Actions runners, while they still work fine when accessing from other sources.

--2024-10-12 23:05:45--  https://dl.openfoam.com/add-debian-repo.sh
Resolving dl.openfoam.com (dl.openfoam.com)... 172.67.128.143, 104.21.2.12, 2606:4700:3033::ac43:808f, ...
Connecting to dl.openfoam.com (dl.openfoam.com)|172.67.128.143|:443... connected.
HTTP request sent, awaiting response... 403 Forbidden
2024-10-12 23:05:45 ERROR 403: Forbidden.

This is negatively affecting a bunch of my OpenFOAM-based projects on GitHub, plus those of anyone using OpenFOAM in their Actions workflows.

If this is due to some rate limiting problem, please let us know so that workflows can be tuned so that they don't impact your server (on my side I already use caching by default to avoid repeating package downloads).

Here's more info about GitHub's IP address range: https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/about-githubs-ip-addresses