Update the ROS key

[EchoHowardLam]

As referenced in https://discourse.ros.org/t/ros-gpg-key-expiration-incident/20669, the GPG key has become invalid again.

The following changes is tested to be working in my fork

# curl is not installed by default
sudo apt install -y curl

# From the linked website
curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -

[davetcoleman]

@EchoHowardLam Could you make a PR for this?

fyi @tylerjw

[EchoHowardLam]

#7 Added pull request. That branch is tested to be working for a newly installed noetic system. However, you are still advised to test it yourself.