Add changelog entry for Internal DNS beta UI release (#23044)

* Add changelog entry for Internal DNS UI beta release

* Add internal dns beta ui screenshot

* Add Enterprise-only note

* Moved image to the right directory

---------

Co-authored-by: hannes <[email protected]>

Author: hannes-cf

src/assets/images/changelog/dns/internal-dns-beta-ui.png

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+---
+title: Internal DNS (beta) now manageable in the Cloudflare dashboard
+description: The Internal DNS (beta) is now fully available in the Cloudflare dashboard.
+date: 2025-06-16T16:00:00Z
+---
+
+Participating beta testers can now fully configure [Internal DNS](/dns/internal-dns/) directly in the [Cloudflare dashboard](https://dash.cloudflare.com/?to=/:account/internal-dns).
+
+## Internal DNS enables customers to:
+
+- Map internal hostnames to private IPs for services, devices, and applications not exposed to the public Internet
+
+- Resolve internal DNS queries securely through [Cloudflare Gateway](/cloudflare-one/policies/gateway/)
+
+- Use split-horizon DNS to return different responses based on network context
+
+- Consolidate internal and public DNS zones within a single management platform
+
+## What’s new in this release:
+
+- Beta participants can now create and manage internal zones and views in the Cloudflare dashboard
+
+![Internal DNS UI](~/assets/images/changelog/dns/internal-dns-beta-ui.png)
+
+:::note
+The Internal DNS beta is currently only available to Enterprise customers.
+:::
+
+To learn more and get started, refer to the [Internal DNS documentation](/dns/internal-dns/).