DOCS-5956 fix toc description

Author: kay-kim

source/includes/toc-security-core-landing.yaml

@@ -12,5 +12,6 @@ description: |
 ---
 file: /core/security-concepts-external-env
 description: |
-  Documentation on the auditing feature available with MongoDB Enterprise.
+  Discusses potential risks related to MongoDB's JavaScript, HTTP and
+  REST interfaces, including strategies to control those risks.
 ...