Update README.md

Author: karniwl

README.md

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+## This project is now in maintenance mode. We cannot promise to review contributions. Please feel free to fork the project to apply any changes you might want to make.
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 <p align="center">
   <img width="200" src="https://docs.driftctl.com/img/driftctl_dark.svg" alt="driftctl">
 </p>