Note ChoiceByTypeDocumentLoader in the unreleased changelog

Author: anatoly-scherbakov

CHANGELOG.md

@@ -8,6 +8,8 @@
 - `pyld.FileDocumentLoader`: a document loader for local `file:` URLs with optional root confinement.
 - `pyld.ChoiceBySchemeDocumentLoader`: a document loader that dispatches URL
   strings to per-scheme loaders.
+- `pyld.ChoiceByTypeDocumentLoader`: a document loader that dispatches by Python
+  input type (e.g. `pathlib.Path` vs `str`).
 
 ### Fixed
 - If value objects contain array values for `@type` during expansion, an error is now raised. Fixes [expand#ter54](https://w3c.github.io/json-ld-api/tests/expand-manifest.html#ter54) and [toRdf#ter54](https://w3c.github.io/json-ld-api/tests/toRdf-manifest.html#ter54).