fix: Remove orphaned closing brace in smart-install.js causing syntax error

Fixes a SyntaxError where an extra closing brace on line 392 was causing
"Missing catch or finally after try" error. The PM2 worker startup
try/catch block was properly formed but had an orphaned closing brace
that didn't match any opening brace.

This was breaking the SessionStart hook and preventing the plugin from
loading correctly.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugin/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-mem",
-  "version": "6.3.6",
+  "version": "6.3.7",
   "description": "Persistent memory system for Claude Code - seamlessly preserve context across sessions",
   "author": {
     "name": "Alex Newman"