message: docs(theme): add migration
diff: @@ -73,3 +73,13 @@ tag:
  - remove `mediaLink`
  Footer no longer displays media links.
  +
  +## Layout
  +
  +### Project HomePage
  +
  +Project HomePage frontmatter options are changed.
  +
  +- `title` renamed to `heroText`
  +- `darkHeroImage` renamed to `heroImageDark`
  +- `action` renamed to `actions`
  