updated README

README.md

 # Sorting Visualizer
 
-Sorting Visualizer demonstrates how Bubble Sort works through an interactive graphical interface.
+Sorting Visualizer demonstrates how Bubble Sort and Merge Sort work through an interactive graphical interface.
 
 [Check it out](https://sorting-visualizer-stdarunte-0b3511e20a59a622aed5caf7134ac4faf2.h-da.io/)