Updated advisory posts against rubysec/ruby-advisory-db@a9b8b9e

Author: jasnow

advisories/_posts/2024-08-22-CVE-2024-43398.md

@@ -55,5 +55,6 @@ advisory:
     - https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
     - https://github.com/ruby/rexml/commit/7cb5eaeb221c322b9912f724183294d8ce96bae3
     - https://github.com/ruby/rexml/releases/tag/v3.3.6
+    - https://hackerone.com/reports/2666849
     - https://github.com/advisories/GHSA-vmwr-mc7x-5vc3
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