Update build.gradle
Update build.gradle

bump 2.6.1
Heiner1/AndroidAPS,jotomo/AndroidAPS,MilosKozak/AndroidAPS,jotomo/AndroidAPS,winni67/AndroidAPS,Heiner1/AndroidAPS,Heiner1/AndroidAPS,winni67/AndroidAPS,Heiner1/AndroidAPS,jotomo/AndroidAPS,MilosKozak/AndroidAPS,MilosKozak/AndroidAPS