WD-16349 Dev Rebrand /ceph/what-is-ceph

[immortalcodes]

Done

• Dev Rebrand /ceph/what-is-ceph
• No change in content.

QA

• Check out this feature branch
• Run the site using the command ./run serve or dotrun
• View the site locally in your web browser at: http://0.0.0.0:8001/
  • Be sure to test on mobile, tablet and desktop screen sizes
• Design
• Demo

Issue / Card

Fixes # WD-16349

Screenshots

[If relevant, please include a screenshot.]

Help

QA steps - Commit guidelines

[webteam-app]

Demo

Jenkins

demos.haus

[mattea-turic]

It's perfect, thanks @immortalcodes !

[britneywwc]

Looks great overall, just some super minor comments and a question about missing alt text. Thanks!