add release note #11650

Author: pdurbin

doc/release-notes/11650-unread.md

@@ -0,0 +1,11 @@
+## API Updates 
+
+### Support read/unread status for notifications
+
+The API for managing notifications has been extended. 
+
+- displayAsRead boolean added to "get all"
+- new GET unreadCount API endpoint
+- new PUT markAsRead API endpoint
+
+See also [the guides](https://dataverse-guide--11664.org.readthedocs.build/en/11664/api/native-api.html#notifications), #11650, and #11664.