Update README.md

Author: sumitmsft

README.md

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 **mssql-python** is a Python driver for Microsoft SQL Server and the Azure SQL family of databases. It leverages Direct Database Connectivity (DDBC) that enables direct connections to SQL Server without requiring an external driver manager. Designed to comply with the [DB API 2.0](https://peps.python.org/pep-0249/) specification, this driver also introduces Pythonic enhancements for improved usability and functionality. It supports a full range of database operations, including connection management, query execution, and transaction handling.
 
-[Documentation](https://github.com/microsoft/mssql-python/wiki) | [Release Notes](https://github.com/microsoft/mssql-python/releases) | [Roadmap](https://github.com/microsoft/mssql-python/roadmap)
+[Documentation](https://github.com/microsoft/mssql-python/wiki) | [Release Notes](https://github.com/microsoft/mssql-python/releases) | [Roadmap](https://github.com/microsoft/mssql-python/blob/main/ROADMAP.md)
 
 ## Installation