To update OpenGL on Arch Linux, you can follow these steps:
The steps above will upgrade your overall system, including the OpenGL libraries. If you want to update specifically the Mesa OpenGL implementation, you can use the following command instead of step 2:
sudo pacman -S mesa
This will only update the Mesa libraries.
Please note that OpenGL is generally considered a part of the graphics drivers, so it's important to regularly update your GPU drivers as well. This can be done by running the appropriate commands provided by your specific GPU manufacturer (e.g., NVIDIA or AMD).