Update README.md

Author: olegranmo

README.md

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 # Tsetlin Machine Unified (TMU) - One Codebase to Rule Them All
-![License](https://img.shields.io/github/license/cair/tmu.svg?style=flat-square) ![Python Version](https://img.shields.io/pypi/pyversions/tmu.svg?style=flat-square) ![Maintenance](https://img.shields.io/maintenance/yes/2024?style=flat-square)
+![License](https://img.shields.io/github/license/cair/tmu.svg?style=flat-square) ![Python Version](https://img.shields.io/pypi/pyversions/tmu.svg?style=flat-square) ![Maintenance](https://img.shields.io/maintenance/yes/2025?style=flat-square)
 
 TMU is a comprehensive repository that encompasses several Tsetlin Machine implementations. Offering a rich set of features and extensions, it serves as a central resource for enthusiasts and researchers alike.