docs: update Ubuntu content.md with "unminimize" instructions

Author: cjdcordeiro

ubuntu/content.md

@@ -28,6 +28,10 @@ RUN apt-get update && apt-get install -y locales && rm -rf /var/lib/apt/lists/*
 ENV LANG en_US.utf8
 ```
 
+## Unminimize
+
+Starting from [Ubuntu 24.10 "Oracular Oriole"](https://discourse.ubuntu.com/t/oracular-oriole-release-notes/44878#unminimize), the `unminimize` command will no longer be shipped by default on all minimal images. It has now been moved to a dedicated package which can be installed via `apt-get install -y unminimize`.
+
 # How is the rootfs built?
 
 The tarballs published by Canonical, referenced by `dist-*` tags in https://git.launchpad.net/cloud-images/+oci/ubuntu-base Git repository, are built from scripts that live in [the livecd-rootfs project](https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+ref/ubuntu/master), especially `live-build/auto/build`. The builds are run on Launchpad. For build history see `livefs` build pages of individual releases on Launchpad: