Code of conduct, contribution guide, etc. are not auto-detected by GitHub

[Bisaloo]

Because they use the .Rmd file extension that GitHub doesn't know about. GitHub expects a .md extension for these files.

Different fixes may be applied to different files:

• Code of conduct file should probably be deleted because it's handled at the organization-level (addressed in Copy latest Code of Conduct from datacarpentry/.github #931)
• Contributing guide should be reviewed and potentially renamed, or deleted
• Citation file should be updated to use CITATION.cff as now recommended in the Carpentries lessons. If I remember correctly, there will be a coordinated effort from the Carpentries core team here. (addressed in Add CITATION file #927)

[CarolynKoehn]

Workbench expects a .md file for the Code of conduct and the contributing files. Would there be a problem if we simply changed the file extensions on those? It seems to me that other lessons have not deleted these files.

A citation file with no extension was added in #927. As you said in that discussion, once all Carpentries lessons start the transition to CITATION.cff, we'll have to revisit that file.