File README.txt of Package amdgpu_top

# Updating to the latest version

* Update the `amdgpu_top` version in the `_service` file.
* Run
  ```
  ./update.sh
  ```
* Add release notes, other changelog relevant comments.  Release notes are here:
  https://github.com/Umio-Yasuno/amdgpu_top/releases
  ```
  osc vc
  ```
* Build:
  ```
  osc build
  osc status
  ```
* Upload changes to OBS:
  ```
  osc commit
  ```