doc/rl-2505: mention Emacs 29 Macport patches and Emacs 28 Macport removal

nixos/doc/manual/release-notes/rl-2505.section.md

@@ -316,6 +316,19 @@
 
 - `virtualisation.azure.agent` option provided by `azure-agent.nix` is replaced by `services.waagent`, and will be removed in a future release.
 
+- `matomo` now defaults to version 5 (previously available as `matomo_5`). Version 4 has been removed as it reached EOL on December 19, 2024.
+
+- `matomo-beta` has been removed as the version of the `matomo` package can now be easily overridden through `overrideAttrs` (see [PR #374022](https://github.com/NixOS/nixpkgs/pull/374022))
+
+- `docker_24` has been removed, as it was EOL with vulnerabilities since June 08, 2024.
+
+- Emacs 28 and 29 have been removed.
+- Emacs 28 Macport has been removed, while patches for CVE-2024-53920 and CVE-2025-1244 have been backported to Emacs 29 Macport.
+
+- `containerd` has been updated to v2, which contains breaking changes. See the [containerd
+  2.0](https://github.com/containerd/containerd/blob/main/docs/containerd-2.0.md) documentation for more
+  details.
+
 - The ZFS import service now respects `fileSystems.*.options = [ "noauto" ];` and does not add that pool's import service to `zfs-import.target`, meaning it will not be automatically imported at boot.
 
 - Default file names of images generated by several builders in `system.build` have been changed as outlined in the table below.