Link to 2020-12 json schema dialect for 2025-11-25 protocol version is incorrect (still in draft also)
https://json-schema.org/2025-11-25/2020-12/schema

This PR fixes the link to be https://json-schema.org/draft/2020-12/schema and change the style from code to link for consistency.

Before the change

After the change

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