Merge bitcoin/bitcoin#34915: doc: archive release notes for v28.4

3e089038aa doc: archive release notes for v28.4 (fanquake)

Pull request description:

ACKs for top commit:
  achow101:
    ACK 3e089038aa
  stickies-v:
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Tree-SHA512: ee12fc46282d62f7adf7f18ce9256b6cec846d1e8e2ba0edbc91f0c275107ec87e96e048728cde0b8b2e993c8121cf0a6376565c7e4eea408ce3177af5d7f2d0

doc/release-notes/release-notes-28.4.md

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+Bitcoin Core version 28.4 is now available from:
+
+  <https://bitcoincore.org/bin/bitcoin-core-28.4/>
+
+This release includes various bug fixes and performance
+improvements, as well as updated translations.
+
+Please report bugs using the issue tracker at GitHub:
+
+  <https://github.com/bitcoin/bitcoin/issues>
+
+To receive security and update notifications, please subscribe to:
+
+  <https://bitcoincore.org/en/list/announcements/join/>
+
+How to Upgrade
+==============
+
+If you are running an older version, shut it down. Wait until it has completely
+shut down (which might take a few minutes in some cases), then run the
+installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on macOS)
+or `bitcoind`/`bitcoin-qt` (on Linux).
+
+Upgrading directly from a version of Bitcoin Core that has reached its EOL is
+possible, but it might take some time if the data directory needs to be migrated. Old
+wallet versions of Bitcoin Core are generally supported.
+
+Compatibility
+==============
+
+Bitcoin Core is supported and extensively tested on operating systems
+using the Linux Kernel 3.17+, macOS 11.0+, and Windows 7 and newer. Bitcoin
+Core should also work on most other UNIX-like systems but is not as
+frequently tested on them. It is not recommended to use Bitcoin Core on
+unsupported systems.
+
+Notable changes
+===============
+
+### Wallet
+
+- #34156 wallet: fix unnamed legacy wallet migration failure
+- #34215 wallettool: fix unnamed createfromdump failure walletsdir deletion
+- #34226 wallet: test: Relative wallet failed migration cleanup
+- #34370 Fix #34222 backport bugs
+
+### P2P
+
+- #33723 chainparams: remove dnsseed.bitcoin.dashjr-list-of-p2p-nodes.us
+
+### Build
+
+- #34227 guix: Fix `osslsigncode` tests
+
+### CI
+
+- #32513 ci: remove 3rd party js from windows dll gha job
+- #34344 ci: update GitHub Actions versions
+- #34463 ci: use macos-14 image
+
+### Misc
+
+- #34174 doc: update copyright year to 2026
+
+Credits
+=======
+
+Thanks to everyone who directly contributed to this release:
+
+- achow101
+- davidgumberg
+- fanquake
+- furszy
+- Hennadii Stepanov
+- Luke Dashjr
+- m3dwards
+- Padraic Slattery
+- SatsAndSports
+
+As well as to everyone that helped with translations on
+[Transifex](https://explore.transifex.com/bitcoin/bitcoin/).