fix: update misleading Image Management description in hub-images index

The previous description said 'optimize your repository storage' which
was vague and did not reflect the page's actual content. The manage.md
page is focused on viewing, filtering, and deleting images and image
indexes. Updated the description to accurately reflect this.

Fixes #25005

Author: mohithshuka

content/manuals/docker-hub/repos/manage/hub-images/_index.md

@@ -16,8 +16,8 @@ repositories, and supported software artifacts.
 - [Tags](./tags.md): Tags help you version and organize different iterations of
   your images within a single repository. This topic explains tagging and
   provides guidance on how to create, view, and delete tags in Docker Hub.
-- [Image Management](./manage.md): Manage your images and image indexes to
-  optimize your repository storage.
+- [Image Management](./manage.md): View, filter, and delete images and image
+  indexes in your repository.
 - [Software artifacts](./oci-artifacts.md): Docker Hub supports OCI (Open
   Container Initiative) artifacts, allowing you to store, manage, and distribute
   a range of content beyond standard Docker images, including Helm charts,