gym add envs

Author: jgvictores

docs/install-gymnasium.md

@@ -9,3 +9,10 @@ This requires [pip](install-pip.md). (Use `pip3` to install the Python 3 version
 ```bash
 pip install gymnasium
 ```
+
+## Additional Information
+
+### Similar and Related
+
+- <https://github.com/roboticslab-uc3m?q=gymnasium> (roboticslab-uc3m)
+- <https://github.com/jgvictores/awesome-deep-reinforcement-learning#rldrl-environments>