Build Actions failing due to new GitHub policy

[PProfizi]

As explained here,
GitHub gradually removed support for certain encryption protocols/keys.

As of March 15th:

We’ll permanently stop accepting DSA keys. RSA keys uploaded after the cut-off point above will work only with SHA-2 signatures (but again, RSA keys uploaded before this date will continue to work with SHA-1). The deprecated MACs, ciphers, and unencrypted Git protocol will be permanently disabled.

This seems to have broken the build pipeline for PyDPF-core, as seen in Action#200 at the Install OpenGL step.
Cloning into 'gl-ci-helpers'... fatal: remote error: The unauthenticated git protocol on port 9418 is no longer supported. Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information.