Update SUMMARY.md structure

Updated documentation structure in SUMMARY.md.

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

Co-Authored-By: Claude <[email protected]>

Author: Phil Whittaker

16/umbraco-cms/SUMMARY.md

@@ -368,7 +368,7 @@
     * [Cursor](reference/developer-mcp/host-setup/cursor.md)
     * [GitHub Copilot](reference/developer-mcp/host-setup/github-copilot.md)
   * [Configuration](reference/developer-mcp/configuration.md)
-  * [Available Tools](reference/developer-mcp/available-tools.md.md)
+  * [Available Tools](reference/developer-mcp/available-tools.md)
   * [MCP as a Toolkit](reference/developer-mcp//mcp-toolkit.md)
   * [Making the most of the developer MCP](reference/developer-mcp/how-best-to-use.md)
 * [API versioning and OpenAPI](reference/api-versioning-and-openapi.md)