Update README.md

README.md

-
 ![alt text](https://avatars2.githubusercontent.com/u/8077370?s=200&v=4)
 
 Skyward Boardcore
+[![pipeline status](https://git.skywarder.eu/r2a/skyward-boardcore/badges/master/pipeline.svg)](https://git.skywarder.eu/r2a/skyward-boardcore/commits/master)
 -------------
 
 Boardcore is the framework in which we develop and build the software dedicated to our rockets' boards.