Update run_yotta.sh
Update run_yotta.sh

correct ';' to ':'
ARMmbed/yotta_osx_installer,ARMmbed/yotta_osx_installer,ARMmbed/yotta_osx_installer,ARMmbed/yotta_osx_installer,ARMmbed/yotta_osx_installer,ARMmbed/yotta_osx_installer