Add changelog entry for 8.17.6

Author: tradebot-elastic

packages/security_detection_engine/changelog.yml

@@ -4,7 +4,7 @@
   changes:
     - description: Release security rules update
       type: enhancement
-      link: https://github.com/elastic/integrations/pulls/0000
+      link: https://github.com/elastic/integrations/pull/12811
 - version: 8.17.6-beta.1
   changes:
     - description: Release security rules update