Update README.md to include cfbd-mcp-server

[lenwood]

Added cfbd-mcp-server to the list of community servers.

Description

Server Details

• Server: https://github.com/lenwood/cfbd-mcp-server
• Changes to: list of community servers

Motivation and Context

Adding a server which supports interaction with the CFBD API.

How Has This Been Tested?

Validated with Claude Desktop.

Breaking Changes

Users will need to update claude_desktop_config.json to include pointers to this server.

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

Thanks for making this list available.