Add a link to best practices for data in Astronomy literature

[nasacrawford]

This is a really useful document by Tracy Chen and collaborators on best practices for data in astronomical literature. It would be useful to link to in either the data pages or resources pages to provide further information.

As for links of the best practices, use the ADS link to the article (https://ui.adsabs.harvard.edu/abs/2022ApJS..260....5C/abstract), or the link to the NED BP page (http://ned.ipac.caltech.edu/Documents/Guides/BestPractices) with the convenient checklist included.