Add changelog entry

Author: Ndpnt

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 All changes that impact users of this module are documented in this file, in the [Common Changelog](https://common-changelog.org) format with some additional specifications defined in the CONTRIBUTING file. This codebase adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased [major]
+
+> Development of this release was supported by the [French Ministry for Foreign Affairs](https://www.diplomatie.gouv.fr/fr/politique-etrangere-de-la-france/diplomatie-numerique/) through its ministerial [State Startups incubator](https://beta.gouv.fr/startups/open-terms-archive.html) under the aegis of the Ambassador for Digital Affairs.
+
+### Changed
+
+- **Breaking:** Rename `documents` key to `terms` in service declarations for vocabulary consistency; update your service declarations accordingly. You can update your declarations by executing the following command at the root of your declarations folder: `find . -name "*.json" -type f -exec sed -i 's/"documents":/"terms":/g' {} +` for Unix-like systems, or `find . -name "*.json" -type f -exec sed -i '' 's/"documents":/"terms":/g' {} +` for macOS
+
 ## 4.2.0 - 2025-02-17
 
 _Full changeset and discussions: [#1135](https://github.com/OpenTermsArchive/engine/pull/1135)._