fix code samples using the http type to use none

[philvarner]

Related Issue(s):

• n/a

Proposed Changes:

1. fix code samples using the http type to use none, since none of these were http format, they showed red highlights in GH

PR Checklist:

• This PR has no breaking changes.
• This PR does not make any changes to the core spec in the stac-spec directory (these are included as a subtree and should be updated directly in radiantearth/stac-spec)
• I have added my changes to the CHANGELOG or a CHANGELOG entry is not required.

[m-mohr]

What would be HTTP format?

[philvarner]

What would be HTTP format?

I don't actually know -- it's supposed to be for the mime type message/http, but I can't find an example of what that actually looks like

[m-mohr]

I guess they want the full header with status codes etc...

200 OK
Content-Type: text/html

or

GET /
Host: example.com
Accept: text/html