Update the information html-campaign data of a campaign with HTML body type.

IMPORTANT - PERMALINK Functionality Warnings:

• This functionality is ONLY intended for marketing campaigns
• DO NOT use for transactional emails
• WARNING: Using PERMALINK in personalized campaigns may exceed URL length limits due to base64-encoded variables in the URL
• PERMALINK variables (e.g., [[var:permalinkUrl]]) will generate publicly accessible HTML files with random filenames stored in a cloud bucket with TTL expiration

Example HTML with PERMALINK:

  <a href='[[var:permalinkUrl]]'>view in your web browser</a>