doc: update release notes with getaddressinfo label deprecation

Summary:
This concludes backport of Core PR17585 [5/5]
https://github.com/bitcoin/bitcoin/pull/17585/commits/d3bc18408146e91b3836f72360ff6fa2420b6887

Depends on D8703

Test Plan: proof-reading

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D8704