fix(README.md): remove poetry shell before building (#459)

Author: maciejmajek

README.md

@@ -113,8 +113,7 @@ rosdep install --from-paths src --ignore-src -r -y
 Run the configuration tool to set up your vendor and other settings:
 
 ```bash
-poetry shell
-streamlit run src/rai/rai/utils/configurator.py
+poetry run streamlit run src/rai/rai/utils/configurator.py
 ```
 
 > [!TIP]