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[Pricer187]

Update changelog to include previously accepted SEP-1034

Motivation and Context

This was missed in the original PR #1035

How Has This Been Tested?

npm run check

Breaking Changes

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 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

Originally posted by @chughtapan in modelcontextprotocol/modelcontextprotocol#1694