fixed/folder typo

[Stackashu]

Here i fixed the typos in the folder naming
deno-middleware-http-page -> demo-middleware-http-page
deno-simple-http-page -> demo-simple-http-page

fixed #59

have review for this

Here's the screenshot

[antho-bunny]

Hello, the intended name for this folder was deno and not demo. The idea was to show an example to use the Bunny SDK within deno and node.

We will try to bring more clarity over it.