[e.cash] Add Upgrade info for Nov 2025

Summary: Similar to D17865

Test Plan: Run it locally, read it through, check links

Reviewers: Fabien, johnkuney, #bitcoin_abc, bytesofman

Reviewed By: Fabien, #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D18767