Merge pull request #14 from serlo/docs/update-pipenv-commands

Update dev documentation

README.md

@@ -8,7 +8,7 @@
 ### Using Pipenv
 
 * Install [pipenv](https://pipenv.pypa.io/en/latest/installation/#installing-pipenv)
+* Run `pipenv shell` to activate the project's [virtual environment](https://docs.python.org/3/library/venv.html). 
 * Run `pipenv install --dev` to install the dev dependencies.
-* Run `pipenv shell` to activate the project's [virtual environment](https://docs.python.org/3/library/venv.html).
 * Run `pipenv run lint` to run the linting.
 * Run `pipenv run format` to format the code.