README corrected

Author: ElviraQDP

README.md

@@ -57,7 +57,7 @@ Note: Once you finish downloading, you will find a "exercises" folder that conta
 3. Start the tutorial/exercises by running the following command at the same level were your bc.json file is:
 
 ```sh
-$ npm i jest@24.8.0 -g
+$ RUN  pip3 install pytest==4.4.2 pytest-testdox mock
 $ learnpack start
 ```