Remove skills from SECURITY.md scope

Skills moved to separate repo: https://github.com/MeshJS/skills

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jinglescode

SECURITY.md

@@ -19,7 +19,7 @@ https://discord.gg/dH48jH3BKa
 
 ## Scope
 
-**In scope:** All code in this repository, including apps/docs, apps/meshjs-mcp, apps/rag-backend, and skills.
+**In scope:** All code in this repository, including apps/docs, apps/meshjs-mcp, and apps/rag-backend.
 
 **Out of scope:** Third-party dependencies without demonstrated impact, social engineering, DoS attacks.