Update relnotes

doc/relnotes/README.md

@@ -26,6 +26,7 @@ exchanges, solo miners and mining pools to update to this release.
   * Fix a bug where `hush-cli stop` would not stop the node during the "Building Witnesses" rescan phase https://git.hush.is/hush/hush3/issues/330
   * Fix bugs where `abortrescan` couldn't be used when node is start up (RPC warmup) and where it could not abort the rescan if it was in the "Building Witnesses" phase  https://git.hush.is/hush/hush3/issues/331
   * Fix bug in `z_mergetoaddress` where docs said you could use `ANY_ZADDR` but you couldn't https://git.hush.is/hush/hush3/commit/7eb9d75b94469c3fc8c028f29b35be9ac764a10c
+  * RPC `z_listunspent` now returns the text representation of a memo in `memoStr` key
   * Upgraded curl to 8.4.0 https://git.hush.is/hush/hush3/issues/325
     * This fixes CVE-2023-38545 which affects very few or potentially no Hush/DragonX users. It could only affect people who compile Hush full node software (not those who use binaries or packages) and who use a malicious SOCKS5 proxy for all network traffic via the operating system.
   * DragonX specific changes: