DOC: Update changelog

CHANGELOG.md

@@ -22,6 +22,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `identifiable_adapters.IdentifiableAdapter.get_identifying_referenced_entities`
   static methods to return the referencing or referenced entities belonging to a
   registered identifiable, respectively.
+* [#70](https://gitlab.com/linkahead/linkahead-crawler/-/issues/70): Optional
+  converters for HDF5 files. They require this package to be installed with its
+  ``h5-crawler`` dependency.
 
 ### Changed ###