Update 05-rmarkdown-example.md

Add Apple "command" Magic Keyboard key

Remove section Displaying Figures

Move brand to the Carpentries

Update to styles v9.5.2

* Add 'cp' (Carpentry) as a lesson type (for instructor training)
* Explain lesson type abbreviations (swc, dc, lc, cp)
* Emphasize the fact that there is no need to edit "repository" variable in front matter

update URLs to reflect consolidation to carpentries organization

Add links.md to files in boilerplate

Fix typo on jekyll install

Makefile: add docker-serve target

Move CODE_OF_CONDUCT.md to boilerplate

fix typo in explanation of keystroke explanationn

remove permalink that breaks asset includes

gitIgnore for R

fix typo