Issue 4 Added Markdown Example

[Mera-Gangapersaud]

I added the markdown example as specified for issue #4
I also edited the Index.scala file to add the markdown example to the list.
Let me know if anything needs to be added or changed. 😄

[sake92]

@Mera-Gangapersaud this looks great! 😃
Can you just make one tiny change, merge these h2 tags:

      h2(s"""## Headers""".md),
      s"""
      Markdown is a simple way to edit text.

as Markdown:

      s"""
      ## Headers
      Markdown is a simple way to edit text.

because you're doubling h2 tags.
TIP: you can also see the site live on Netlify if you click on All checks have passed and then Details.

[sake92]

Merging, thanks! 🙂