Update PLUG.md description to trigger library update

SilverBullet's update mechanism hashes PLUG.md content only —
unchanged PLUG.md means files[] are never re-fetched.

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

Author: selcux

PLUG.md

@@ -4,4 +4,4 @@ tags: meta/library
 files:
 - atlas.plug.js
 ---
-Interactive local knowledge graph view for SilverBullet. Shows linked pages as a force-directed graph in the right panel, auto-updating as you navigate.
+Interactive local knowledge graph view for SilverBullet. Shows linked pages as a force-directed graph in the right panel, auto-updating as you navigate. Includes a toolbar with orphan page detection toggle.