Update README.md

Author: ttdtrang

README.md

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 ## Notes
 
 * [Release v0.99.1](https://github.com/ttdtrang/gbnorm/releases/tag/v0.99.1) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.3628859.svg)](https://doi.org/10.5281/zenodo.3628859) is the first working snapshot of gbnorm. This version was used in the paper https://doi.org/10.1371/journal.pone.0227760. In this implementation, all the functions taking expression matrix as an input assume that it is _samples_ (rows) x _features_ (columns).
-* [Release v0.99.2](https://github.com/ttdtrang/gbnorm/releases/tag/v0.99.2) made changes to the `normalize.___()` functions that take expression matrix as an input such that the matrix is _features_ (rows) x _samples_ (columns).
+* [Release v0.99.2](https://github.com/ttdtrang/gbnorm/releases/tag/v0.99.2) made changes to the `normalize.___()` functions that take expression matrix as an input. The input matrix should now be _features_ (rows) x _samples_ (columns).
 
 ## License