Add a deprecation notice for Ammonite.

Mention in the changelog that Scala users should start moving away from
Ammonite towards Scala-CLI.

Author: gouttegd

CHANGELOG.md

@@ -14,7 +14,7 @@ For more detailed changes see:
 - New [ROBOT Version 1.9.6](https://github.com/ontodev/robot/releases/tag/v1.9.6). This came with a great number of updates and upgrades, see release notes.
 - J2cli, a command-line tool to process Jinja2 templates, has been replaced by [Jinjanator](https://github.com/kpfleming/jinjanator). If your custom workflows invoke the `j2` tool, you will need to update them to use `jinjanate` instead.
 - New program `dicer-cli` to manage the ID range file.
-- Ammonite, the Scala interpreter, is no longer provided in the ODKLite image. If you need Ammonite, you must now use the ODKFull image.
+- Ammonite, the Scala interpreter, is no longer provided in the ODKLite image. If you need Ammonite, you must now use the ODKFull image. Be warned that Ammonite is slated for complete removal in a future ODK release, you should use Scala-CLI instead.
 - The Scala-CLI Scala runner has been added to the ODKFull image.
 
 ## New configuration options