Update README.md

README.md

@@ -7,7 +7,7 @@
 [![coverage](https://rwth-ebc.github.io/FiLiP/master/coverage/badge.svg)](https://rwth-ebc.github.io/FiLiP/master/coverage)
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
 [![build](https://rwth-ebc.github.io/FiLiP/master/build/build.svg)](https://rwth-ebc.github.io/FiLiP/master/build/build.svg)
-[![DOI](https://joss.theoj.org/papers/10.21105/joss.06953/status.svg    )](https://doi.org/10.21105/joss.06953   )
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.06953/status.svg     )](https://doi.org/10.21105/joss.06953    )
 
 FiLiP (Fiware Library for Python) is a python software development kit (SDK) for 
 accelerating the development of web services that use Fiware's Generic 
@@ -80,6 +80,7 @@ You can register for a testing account
 | 3.11     | ✅ Tested   |
 | 3.12     | 🔄 Ongoing   |
 
+> ✅ Tested python versions have passed the unittests 
 
 ### Installation