[Docs]: OpenAPI title is MCP_Gateway instead of MCP Gateway

[madhav165]

📚 Documentation Issue Summary

OpenAPI title is MCP_Gateway instead of MCP Gateway

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📍 Location of the Problem

openapi.json

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✏️ Type of Issue

• Typo or formatting issue
• Outdated or incorrect information
• Missing explanation or example
• Unclear instructions
• Other (explain below)

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[crivetimihai]

Updated test documentation. The OpenAPI title comes from .env -> APP_NAME=MCP_Gateway.