v0.4.1: gatle-ignite 0.4.1

Release process hardening. No changes to the package code: the installed package is the same as
0.4.0 apart from its version number.

• Every GitHub Actions step in the CI, docs and release workflows is pinned to an exact commit.
• Checkouts no longer leave git credentials on disk for later steps.
• A security policy (.github/SECURITY.md) says how to report a vulnerability privately.

pip install gatle-ignite==0.4.1

v0.4.0: gatle-ignite 0.4.0

Initial release.

pip install gatle-ignite==0.4.0