Add remaining feature screenshots, if needed

## Feature Description

We may need to follow up on https://github.com/google/site-kit-wp/issues/13247 to add any screenshots that weren't available when executing the issue.

See this [Figma thread](https://www.figma.com/design/7gBBIQhrIvLicLinAt9vta/Feature-Discovery-Hub?node-id=1599-1379#1868927288).

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## Acceptance criteria

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## Implementation Brief

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### Test Coverage

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## QA Brief

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## Changelog entry

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