docs: more verbose discription of new tags in CHANGELOG

CHANGELOG.md

@@ -3,13 +3,15 @@
 This change log covers changes to the docker image and does not include
 [changes to the micromamba program](https://github.com/mamba-org/mamba/blob/main/CHANGELOG.md).
 
-## 7 October 2024
+## 8 October 2024
 
 - Updated to micromamba version 2.0.2
 - **Breaking Change**: Our image tagging scheme has been changed. We are no
   longer making use of release names (such as `bullseye` or `bookworm` for
   `debian` or `noble` or `jammy` for `ubuntu`) in the tags. Instead we are
-  using version numbers.
+  using version numbers such as `12` for `debian` or `22.04` for `ubuntu`. As
+  always, you can find the [full list of current tags](
+  https://hub.docker.com/r/mambaorg/micromamba) on Dockerhub.
 - Add image based on `public.ecr.aws/amazonlinux/amazonlinux:2023`
 - To support adding the `amazonlinux` base image (which is derived from RHEL),
   we have moved from a single `Dockerfile`, to multiple `Dockerfile` files.