Add GitHub Help link
Add GitHub Help link

Add link to the custom domain article in the GitHub Help

ros-agriculture/ros-agriculture.github.io,ros-agriculture/ros-agriculture.github.io,sanspace/sanspace.github.io,ebrugulec/ebrugulec.github.io,calina-c/calina-c.github.io,ros-agriculture/ros-agriculture.github.io,boris/boris.github.com,boris/boris.github.com,boris/boris.github.com,ans-4175/ans-4175.github.io,mikefrizzell/mikefrizzell.github.io,mikefrizzell/mikefrizzell.github.io