updated docs\changelog

CHANGELOG.md

@@ -27,6 +27,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Mastodon API: Add `pleroma.direct_conversation_id` to the status endpoint (`GET /api/v1/statuses/:id`)
 - Mastodon API: `pleroma.thread_muted` to the Status entity
 - Mastodon API: Mark the direct conversation as read for the author when they send a new direct message
+- Mastodon API: Add `pleroma.unread_count` to the Marker entity
 </details>
 
 ### Added

docs/API/differences_in_mastoapi_responses.md

@@ -155,3 +155,9 @@ Has theses additionnal parameters (which are the same as in Pleroma-API):
     * `captcha_solution`: optional, contains provider-specific captcha solution,
     * `captcha_token`: optional, contains provider-specific captcha token
     * `token`: invite token required when the registerations aren't public.
+
+## Markers
+
+Has these additional fields under the `pleroma` object:
+
+- `unread_count`: contains number unread notifications