Add comments about necessary linux packages in README (#1191)

README.md

@@ -28,6 +28,8 @@ To install the dependencies for one family, use `pip install 'pettingzoo[atari]'
 
 We support Python 3.8, 3.9, 3.10 and 3.11 on Linux and macOS. We will accept PRs related to Windows, but do not officially support it.
 
+Note: Some Linux distributions may require manual installation of `cmake`, `swig`, or `zlib1g-dev` (e.g., `sudo apt install cmake swig zlib1g-dev`)
+
 ## Getting started
 
 For an introduction to PettingZoo, see [Basic Usage](https://pettingzoo.farama.org/content/basic_usage/). To create a new environment, see our [Environment Creation Tutorial](https://pettingzoo.farama.org/tutorials/custom_environment/1-project-structure/) and [Custom Environment Examples](https://pettingzoo.farama.org/content/environment_creation/).