Changes

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<big>'''<span style="color:#FF0000">Note that running the following command needs to ensure that the development board can access github normally, otherwise an error will be reported due to network problems.</span>'''

'''The install_ros.sh script will try to modify /etc/hosts and automatically run the following commands. However, this method cannot guarantee normal access to github every time. If the following error is prompted after installing ros1 in install_ros.sh, please find other ways to allow the Linux system of the development board to access github normally, and then manually run the following Order.'''

'''https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml'''