Change v3 active branches to [master]
Change v3 active branches to [master]

Extend the list when it becomes relevant.
The old platform shall use the legacy branch.

avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox,avatao-content/challenge-toolbox