blog: add hyperlink to find_and_save_rings post in release blog

Author: plowsof

_posts/2025-08-26-monero-0.18.4.2-released.md

@@ -17,7 +17,7 @@ This is the v0.18.4.2 release of the Monero software. This is a recommended rele
 
 Some highlights of this release are:
 
-- Wallet: fix privacy leak with malicious remote node (#[10015](https://github.com/monero-project/monero/pull/10015))
+- Wallet: fix privacy leak with malicious remote node (#[10015](https://github.com/monero-project/monero/pull/10015)). For a detailed report, read [Post mortem of `find_and_save_rings()` bug]({{ site.baseurl_root}}/2025/08/26/post-mortem-of-find-and-save-rings-bug.html)
 - Daemon: more accurate connection count (#[10047](https://github.com/monero-project/monero/pull/10047))
 - Minor bug fixes and improvements
 

_posts/2025-08-26-monero-GUI-0.18.4.2-released.md

@@ -19,7 +19,7 @@ This is the v0.18.4.2 release of the Monero GUI software. This is a recommended
 
 Some highlights of this release are:
 
-- Fix privacy leak with malicious remote node
+- Fix privacy leak with malicious remote node. For a detailed report, read [Post mortem of `find_and_save_rings()` bug]({{ site.baseurl_root}}/2025/08/26/post-mortem-of-find-and-save-rings-bug.html)
 - Add background sync when locked functionality (#[4050](https://github.com/monero-project/monero-gui/pull/4050))
 - Update P2Pool to v4.9.1, fix Linux permission bug (#[4490](https://github.com/monero-project/monero-gui/pull/4490))
 - Add P2Pool nano sidechain (#[4482](https://github.com/monero-project/monero-gui/pull/4482))