Merge pull request #108 from mdemichele/readme_change

changed two lines of readme

Author: LucasPilla

README.md

@@ -18,8 +18,8 @@ Visit [repository github page](https://lucaspilla.github.io/Sorting-Algorithms-V
 ## Using the application
   :exclamation: Feel free to open an issue if you have some problem :exclamation:
 - Clone GitHub repository
-- Install requirements: `pip install -r requirements.txt`
-- Run: `python main.py`
+- Install requirements: `pip3 install -r requirements.txt`
+- Run: `python3 main.py`
 
 ## How to contribute: 
 - Implement new Algorithms or ideas