docs: correct pr number

Author: Soheab

CHANGELOG.md

@@ -18,7 +18,7 @@ These changes are available on the `master` branch, but have not yet been releas
   `Attachment.save` for retrieving attachments in chunks.
   ([#2956](https://github.com/Pycord-Development/pycord/pull/2956))
 - Added a new event called `on_raw_member_update` that is dispatched when a member is updated,
-  regardless of cache status. ([#3011](https://github.com/Pycord-Development/pycord/pull/3011))
+  regardless of cache status. ([#3012](https://github.com/Pycord-Development/pycord/pull/3012))
 
 ### Changed