Rename `virtualenv` to `venv` in README.md

[ci skip]

README.md

@@ -191,11 +191,11 @@ You will then find the index page of the documentation at
 ## Run, DORiE, Run!
 DORiE provides a command line interface (CLI) for all its functions.
 The required Python modules and all their dependencies are readily installed
-into a virtual environment (`virtualenv`), which has to be activated within a
+into a virtual environment (`venv`), which has to be activated within a
 shell session. You can do so by activating it in your current session
 (Manual Installation only) or by running the Docker application.
 
-### Run the `virtualenv` using the Docker application
+### Run the `venv` using the Docker application
 If you did not install DORiE locally, you can use the Docker
 application to boot up the virtual environment in a mounted directory of choice.
 
@@ -217,7 +217,7 @@ virtual environment activated.
 Notice, that you can only use **local file paths** in all configuration settings
 due to the directory mount.
 
-### Activate the `virtualenv` locally
+### Activate the `venv` locally
 To activate the virtual environment within your current shell session, execute
 
     source <path/to/>dorie/build-cmake/activate