Markdown incorrectly saved as HTML

This release addressed issues affecting Markdown in unconfigured Inputs and the Content Editor.

Fixes#

• Fixed an issue where CloudCannon would incorrectly save Markdown content in an unconfigured Input as HTML when the key name followed Markdown Input naming conventions (i.e., the key name was markdown or ended in _markdown).
• Fixed an issue where CloudCannon would incorrectly save Markdown content edited in the Content Editor as HTML.