Fix MDX syntax error: escape < character in protocol-kernel.mdx

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

content/docs/concepts/protocol-kernel.mdx

@@ -18,7 +18,7 @@ The **Kernel Protocol** defines the plugin system and runtime management for Obj
 - **Slow innovation:** Want AI-powered search? Wait for the vendor's roadmap (or never get it)
 - **License costs:** Pay $150/user/month for "Enterprise Edition" just to get SSO
 
-**Solution:** The Kernel Protocol implements a **microkernel architecture** like Linux or Kubernetes. The core runtime is <10MB and does almost nothing—just loads plugins. Every feature (data access, UI, workflows, AI) is a plugin. Don't need dashboards? Don't load the dashboard plugin. Want better analytics? Replace the default plugin with your own.
+**Solution:** The Kernel Protocol implements a **microkernel architecture** like Linux or Kubernetes. The core runtime is &lt;10MB and does almost nothing—just loads plugins. Every feature (data access, UI, workflows, AI) is a plugin. Don't need dashboards? Don't load the dashboard plugin. Want better analytics? Replace the default plugin with your own.
 
 ## Business Value Delivered