Update README.md

README.md

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 [![Build Status](https://travis-ci.org/lucianodato/speech-denoiser.svg?branch=master)](https://travis-ci.org/lucianodato/speech-denoiser)
 
+**WARNING!!!!** This project is not being actively mantained currently please refer to https://github.com/werman/noise-suppression-for-voice which is similar and more updated.
+
 speech-denoiser
 ------
 A speech denoise lv2 plugin based on the modified Xiph's RNNoise library by GregorR