License (SPDX) maintenance strategy

[vancauwe]

We use two data files for license matching, generated by the script generate_tfidf.py

Depending on the update rate of SPDX , we can see to have a GitHub Action to automate generation or, if release rate is once per year, then we can stick to a manual update. However, we should see to have a reminder to stay up-to-date.

[cmdoret]

note: spdx has new releases of their full list ~ every 6 months, however we only use the osi-approved licenses, which may not change nearly as frequently (Need to check).