Update Trade Agent entry in README

[DeanMauro]

Description

Trade Agent has rebranded to Trade It. I've updated the entry to match.

Server Details

• Server: https://github.com/trade-it-inc/trade-it-mcp (previously https://github.com/Trade-Agent/trade-agent-mcp)
• Changes to: README

Motivation and Context

An existing entry in the list rebranded.

How Has This Been Tested?

N/A

Breaking Changes

N/A

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