"OBS Studio Fully-loaded" is now "OBS Studio Portable"

Under [Setting up OBS Studio](https://github.com/mikeroyal/PipeWire-Guide#Setting-up-OBS-Studio), there's a suggestion to install **OBS Studio Fully-loaded**. 

The **README.md** for [OBS Studio Fully-loaded](https://github.com/wimpysworld/obs-fully-loaded) says:

**THIS SCRIPT IS NO LONGER MAINTAINED. PLEASE USE https://github.com/wimpysworld/obs-studio-portable**