Add Topolograph MCP server to README

[Vadims06]

Description

Add Topolograph MCP server to README

Server Details

• Server:
• Changes to:

Motivation and Context

This update adds Topolograph MCP server https://github.com/Vadims06/topolograph-mcp-server to interact with real networks (OSPF/IS-IS) protocols

How Has This Been Tested?

Yes, demo video is https://youtu.be/92YBRXqZWUo

Breaking Changes

No

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [*] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• [*] I have read the MCP Protocol Documentation
• [*] My changes follows MCP security best practices
• [*] I have updated the server's README accordingly
• [*] I have tested this with an LLM client
• [*] My code follows the repository's style guidelines
• [*] New and existing tests pass locally
• [*] I have added appropriate error handling
• [*] I have documented all environment variables and configuration options

Additional context

[olaservo]

Thanks for your contribution to the servers list. This has been merged in this combined PR: #2973