Adding a note to the changelog

CHANGELOG.md

@@ -18,6 +18,7 @@
 * You can set the threshold levels for trace output on individual categories. ([realm/realm-core#7004](https://github.com/realm/realm-core/pull/7004))
 * Improved performance of RQL queries on a non-linked string property using `>`, `>=`, `<`, `<=` operators and fixed behavior that a null string should be evaluated as less than everything, previously nulls were not matched. ([realm/realm-core#3939](https://github.com/realm/realm-core/issues/3939))
 * Added support for using aggregate operations on Mixed properties in queries. ([realm/realm-core#7398](https://github.com/realm/realm-core/pull/7398))
+* Added a static `Realm.shutdown()` method, which closes all Realms, cancels all pending `Realm.open` calls, clears internal caches, resets the logger and collects garbage. Call this method to free up the event loop and allow Node.js to perform a graceful exit.
 
 ### Fixed
 * Aligned Dictionaries to Lists and Sets when they get cleared. ([#6205](https://github.com/realm/realm-core/issues/6205), since v10.3.0-rc.1)