Merge pull request #3017 from vkarak/doc/update-readme

[doc] Update README in regards to public test repos

Author: victorusu

README.md

@@ -74,18 +74,16 @@ python3 -m http.server
 
 The documentation is now up on [localhost:8000](http://localhost:8000), where you can navigate with your browser.
 
-
 ## Test library
 
-The framework comes with a library of tests that users can either run them from the command line directly or extend them and fine tune them for their systems. See [here](https://reframe-hpc.readthedocs.io/en/stable/hpctestlib.html) for more details.
-
+The framework comes with an experimental library of tests that users can either run from the command line directly or extend and fine tune them for their systems. See [here](https://reframe-hpc.readthedocs.io/en/stable/hpctestlib.html) for more details.
 
-## Test examples
+## Public test repositories
 
-You can find examples of real tests under the ReFrame HPC [community Github page](https://github.com/reframe-hpc).
-The most complete suite of tests currently publicly available is that of [CSCS](https://cscs.ch/), which you can also find [here](https://github.com/eth-cscs/cscs-reframe-tests).
-You can use those tests as a starting point for implementing your own tests.
+The ReFrame HPC [community Github page](https://github.com/reframe-hpc) provides mirror forks of interesting ReFrame test repositories maintained by various sites or projects.
+You can use those tests as an additional guidance to implement your own tests.
 
+If you maintain a public test repository and you would like it to be listed in the community page, feel free to open an issue or contact us through [Slack](#slack).
 
 ## Contact