Add MCPJungle to Community Servers list in README

[duaraghav8]

Description

Add MCPJungle to the Community Servers list

Server Details

• Server: mcpjungle

Motivation and Context

This PR adds MCPJungle as a new entry to the list of community servers.
MCPJungle is a self-hosted MCP aggregator for developers and enterprises to keep track of all their MCPs in one place. It provides a single endpoint to all agents & mcp clients for accessing MCP tools.

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 Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context