[e.cash] Upgrade announcement for May 2024
Summary: Depends on D15876
Test Plan:
Read through the description to make sure the info is correct.
Ran it locally to see that it looks good.
Reviewers: Fabien, #bitcoin_abc, bytesofman
Reviewed By: Fabien, #bitcoin_abc, bytesofman
Subscribers: bytesofman
Differential Revision: https://reviews.bitcoinabc.org/D15877