Update collection-index.yml

[Siri (siri404)]

What type of PR is this?

• Add a new dev container collection
• Update to an existing dev container collection
• Documentation/spec update
• Other containers.dev site update (UX, layout, etc)

Related Issues

• Related Issue #
• Closes #

Description

Adds AI features in devcontainers. For eg, Gemini CLI

Collection checklist

If your PR contributes a new collection, please utilize this checklist:

• Collection name
• Maintainer name
• Maintainer contact link (i.e. link to a GitHub repo, email)
• Repository URL
• OCI Reference
• I acknowledge that this collection provides new functionality, distinct from the existing collections part of this index.

[Kaniska (Kaniska244)]

Hi Siri (@siri404)

Thank you for the contribution. Would you kindly break this into multiple features you would like to add to the index and also add collections in the ghcr for the oci referemce accordingly.

[Kaniska (Kaniska244)]

Change looks fine. To be further reviewed by maintainers