Add code block support for webhooks

The zoom chat client supports code blocks. Using the chat app card builder kit I am unable to simulate a code block using the markdown tags. A single tick can be used to tag a single line but the code blocks do not work.

For example, in the chat client, type “```” to generate a code block. None of the api documentation indicates this is possible, but I suspect it’s just a matter of updating the Zoom API to parse this markdown correctly as to keep up with the features that Zoom chat does support on the front.

Inline code with single backticks works fine, but triple backtick code blocks don’t render through the Card Builder either. From what I can tell, the card schema currently only supports a subset of markdown and doesn’t yet extend to full code block formatting.