automatically create agenda for next week's learning meeting

[locks]

The learning team would like to automate the creation of the following week's agenda as a quality of life improvement. This can be done as a GitHub action that is triggered once the current agenda is merged. The action would create a new PR with the agenda in the correct place and the relevant date.

[MinThaMie]

I think I've found a GitHub action that does something similar with issues: https://jasonet.co/posts/scheduled-actions/#jasonetcocreate-an-issue. But maybe combining it with this one could work: https://github.com/marketplace/actions/generate-update-markdown-content