Update continuous_integration.yml (#3286)
Update continuous_integration.yml (#3286)

use setup-python with 3.8 to avoid installing old numpy with 3.10 on osx

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core