Clarifies that Score-PPA is maintained by Score-P Community

Author: NanoNabla

README.md

@@ -30,7 +30,7 @@ scorep is a module that allows tracing of python scripts using [Score-P](https:/
 You need at least Score-P 5.0, build with `--enable-shared` and the gcc compiler plugin.
 Please make sure that `scorep-config` is in your `PATH` variable.
 
-For Ubuntu LTS systems there is a official ppa of Score-P available: https://launchpad.net/~score-p/+archive/ubuntu/releases .
+The Score-P community provides an unofficial PPA for Ubuntu LTS systems: https://launchpad.net/~score-p/+archive/ubuntu/releases .
 
 Then install the package from PyPI