Mentioned that registration is required for two sites

[moosetwin0]

Description

See title, the sites are DaVinci Resolve and Mastershot.

Context

Makes it more clear that these sites require registration.

Types of changes

• Bad / Deleted sites removal
• Grammar / Markdown fixes
• Content addition (sites, projects, tools, etc.)
• New Wiki section
  I am unsure, it adds new content but I don't know if this is enough to fall into that category as the examples listed are significantly longer.

Checklist:

• I have read the contribution guide.
• I have made sure to search before making any changes.
• My code follows the code style of this project.
  I tried to make it similar to a 'registration required' message elsewhere on the wiki.