Update README.md

Author: ujjwalkarn

README.md

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 # Python Data Science Tutorials 
 - This repo contains a curated list of Python tutorials for Data Science, NLP and Machine Learning.
 
-- [Curated list of R tutorials for Data Science, NLP and Machine Learning](https://github.com/ujjwalkarn/DataScienceR).
+- [**Curated list of R tutorials for Data Science, NLP and Machine Learning**](https://github.com/ujjwalkarn/DataScienceR).
 
-- [Comprehensive topic-wise list of Machine Learning and Deep Learning tutorials, codes, articles and other resources](https://github.com/ujjwalkarn/Machine-Learning-Tutorials/blob/master/README.md).
+- [**Comprehensive topic-wise list of Machine Learning and Deep Learning tutorials, codes, articles and other resources**](https://github.com/ujjwalkarn/Machine-Learning-Tutorials/blob/master/README.md).
 
 ##Language
 - [**Dive Into Python**](http://www.diveintopython.net/index.html)