File README.Update of Package selinux-policy.31619

# How to update this project

This project is updated using obs services.
The obs services pull from git repositories, which are specified in the `_service` file.
Please contribute all changes to the upstream git repositories listed there.

To update this project to the upstream versions, please make sure you installed these obs services locally:
```
sudo zypper in obs-service-tar_scm obs-service-recompress obs-service-set_version obs-service-download_files
```

Then, generate new tarballs, changelog and version number for this repository by running this command:
```
sh update.sh
```

Afterwards, please check your local project state and remove old tarballs if necessary.
Then proceed as usual with check-in and build.