doc: fixed repository path for brave-chatbot

[jenshb]

fixed repository path for brave-chatbot

Motivation and Context

Wrong path in cd command

How Has This Been Tested?

tested in local environment

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)
• [x ] Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context