DOCSP 41465: docs realm release notes w/e 07/19 (#3330)

## Pull Request Info

Jira ticket: https://jira.mongodb.org/browse/DOCSP-41465

---------

Co-authored-by: lindseymoore <[email protected]>

Author: osharaf-mdb

docs-release-notes.md

@@ -1,3 +1,16 @@
+# July 19, 2024
+
+## Flutter SDK
+
+- Realm Database/Serialization: Add new page for serialization of objects to and from EJSON.
+
+## Node.js SDK
+
+- Model Data/Data Types
+  - Counters: Create page to document the addition of the ``Counter`` class and data type to the
+    Node.js SDK and update the Table of Contents to reflect the addition.
+  - Field Types: Add ``counter`` as a supported data type.
+
 # July 12, 2024
 
 ## .NET SDK