misc/py-mcp: Update to 2.0.0

ChangeLog:

• https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.28.0
• https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.29.0
• https://github.com/modelcontextprotocol/python-sdk/releases/tag/v2.0.0

Reported by: Max <notifications@github.com>