Small post promoting Ubuntu 24.04 LTS

Just a few paragraph to mention we support Ubuntu 24.04 LTS now.

content/posts/ubuntu-24-04.md

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+title: Ubuntu 24.04 LTS available
+date: 2024-06-19
+description: The latest Ubuntu 24.04 LTS version is available to build documentation projects on Read the Docs.
+category: Changelog
+tags: builders, docker, images
+authors: Manuel Kaufmann
+status: published
+image: /images/ubuntu-24-04.jpg
+image_credit: Photo by <a href="https://unsplash.com/@6heinz3r?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Gabriel Heinzer</a> on <a href="https://unsplash.com/photos/green-and-black-digital-device-xbEVM6oJ1Fs?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash">Unsplash</a>
+
+We are happy to announce that we added support for the latest Ubuntu 24.04 LTS version released on April, 2024.
+This new image is available to build documentation projects by using the YAML config `build.os: "ubuntu-24.04"`.
+
+We plan to update the `build.os: "latest"` alias after some weeks of testing the this image image.
+
+[Let us know](https://readthedocs.org/support/) any feedback you may have about this new Ubuntu 24.04 LTS image,
+or if your documentation project special needs that are not covered by Ubuntu images.