docs: add video-transcriber-mcp-rs to projects built with rmcp

[nhatvu148]

Adding video-transcriber-mcp-rs to the list of projects built with rmcp

Motivation and Context

This PR adds video-transcriber-mcp-rs to
the "Built with rmcp" section of the README. The project is a high-performance MCP server for
transcribing videos from 1000+ platforms using whisper.cpp, demonstrating real-world usage of the
rmcp SDK.

How Has This Been Tested?

The project itself has been tested and is functional. This PR only adds a documentation entry to
the README following the existing format in the "Built with rmcp" section.

Breaking Changes

No breaking changes - this is purely a documentation update.

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

The video-transcriber-mcp-rs project provides video transcription capabilities through MCP,
supporting 1000+ platforms via yt-dlp integration and using whisper.cpp for efficient
transcription. Adding it to this list helps showcase the versatility of rmcp and provides a
reference implementation for others interested in building media processing MCP servers.

[alexiokay]

Vortideck.com is also built with rust mcp, but it's private repo, only release repo is public, what can I do to be mentioned?