update readme

Author: tonytrg

docs/server-configuration.md

@@ -342,7 +342,7 @@ Lockdown mode ensures the server only surfaces content in public repositories fr
 ---
 
 ## Useful links
-
+[README: Tool Configuration](../README.md#tool-configuration)
 - [README: Tool Configuration](https://github.com/github/github-mcp-server?tab=readme-ov-file#tool-configuration) — Full reference for toolsets, tools, and flags
 - [README: Available Toolsets](https://github.com/github/github-mcp-server?tab=readme-ov-file#available-toolsets) — Complete list of toolsets
 - [README: Tools](https://github.com/github/github-mcp-server?tab=readme-ov-file#tools) — Complete list of individual tools