docs: Update CHANGELOG for XMPP uploads

Author: selfhoster1312

changelog.md

@@ -38,6 +38,8 @@
 - xmpp
   - New and revised advanced authentication settings `UseDirectTLS`, `NoStartTls`, `NoPlain`, and `Mechanism` ([#77](https://github.com/matterbridge-org/matterbridge/pull/77))
   - Log message type='error' as warnings for easier debugging ([#173](https://github.com/matterbridge-org/matterbridge/pull/173))
+  - Can now upload files from bytes in addition to sharing attachement URLs ([#23](https://github.com/matterbridge-org/matterbridge/pull/23/))
+  - Can now receive and download OOB attachments from XMPP channels to share with other bridges ([#23](https://github.com/matterbridge-org/matterbridge/pull/23/))
 - discord
   - Replies will be included inline ([#124](https://github.com/matterbridge-org/matterbridge/pull/124), thanks @lekoOwO), by default like "(re name: message)". This is useful when bridging to destinations that do not understand replies, but distracting when the destination does. Can be disabled with `QuoteDisable=true` under your `[discord]` config.
   - whatsapp