Change virtualenv to venv.

README.md

@@ -119,14 +119,13 @@ If you are not planning to go with Docker or just want to setup a local developm
 - [`pip`](https://pip.pypa.io/en/stable/)
 - [`git`](https://git-scm.com/)
 - [PostgreSQL 13+](https://www.postgresql.org/)
-- [Virtualenv](https://virtualenv.pypa.io/en/latest/) (Optional, development only)
 
 ### Installation
 
 Create a virtual environment for your Python dependencies:
 
 ```bash
-virtualenv -p python3.8 python
+python3.8 -m venv python
 ```
 
 To activate that environment, run