Link to example .md file is broken

[maneesha]

What is the problem?

In the Use machine readable plain text notation for formatting section we refer users to view the underlying markdown of a lesson. This link does not work, and the episodes in that repo are all in html format.

Location of problem (optional)

https://librarycarpentry.org/lc-overview/06-file-naming-formatting.html#use-machine-readable-plain-text-notation-for-formatting