Update 'README.md'

README.md

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 > Timers and other features for Heroes of the Storm
 
-Current status : [![Build Status](https://ci.deuchnord.fr/api/badges/aagez/nexus-timers/status.svg)](https://ci.deuchnord.fr/aagez/nexus-timers)
+Current status : [![Build Status](https://ci.deuchnord.fr/api/badges/aagez/nexus-timers/status.svg?ref=refs/heads/master)](https://ci.deuchnord.fr/aagez/nexus-timers)
 
 ## Build Setup