Add changelog entry

Author: Ndpnt

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 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 [patch]
+
+### Fixed
+
+- Fix validation of the collection metadata file
+
 ## 5.0.1 - 2025-03-04
 
 _Full changeset and discussions: [#1139](https://github.com/OpenTermsArchive/engine/pull/1139)._