Add link text to the basic user guide

[thegsi]

Is it possible to 'add a link/URL' section to '1. Set Table Headers' section of https://github.com/docuracy/Locolligo/blob/main/User-Guide-Basic.md? Should the main link from the Peripleo popup always be assigned to '@id' in the Assign CSV columns popup? If so please could this be stated in the aforementioned section, thanks. If you confirm I can add the text.