I encountered the error error: externally-managed-environment while trying to install pytest following the "Get Started" guide. #15242

I opened the pytest guide at https://docs.pytest.org/en/stable/getting-started.html and attempted the installation.
When I ran the command pip install -U pytest, I received the following error: error: externally-managed-environment.
As a beginner, I wouldn't know the next steps to successfully install the library. Furthermore, the error message suggests using the --break-system-packages flag, an action that could potentially break the operating system's Python installation and any tools that depend on it.
Your documentation page at https://docs.pytest.org/en/stable/explanation/goodpractices.html states: "For development, we recommend you use venv for virtual environments and pip for installing your application and any dependencies, as well as the pytest package itself." I would suggest adding a note next to the installation command explaining that it is recommended to perform the installation within a virtual environment, along with a link to an explanatory page.
Would you be open to a small PR that adds this?
My environment details:
Ubuntu 24.04.2 LTS (WSL)
Python 3.12.3 (system Python)
pip 24.0