[backport#13756] doc: release notes for avoid_reuse

Summary:
https://github.com/bitcoin/bitcoin/pull/13756/commits/ada258f8c8f92d44d893cf9f22d15acdeca40b1a

Depends on D6467

Partial backport of Core PR13756

Test Plan: none

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D6468