Add changelog entry for splitTask

Add changelog entry for #62665

Author: westonruter

packages/interactivity/CHANGELOG.md

@@ -4,6 +4,10 @@
 
 ## 6.1.0 (2024-06-15)
 
+### Enhancements
+
+-   Export `splitTask` function from `@wordpress/interactivity` package to facilitate yielding to the main thread. See example in [async actions](https://github.com/WordPress/gutenberg/blob/trunk/docs/reference-guides/interactivity-api/api-reference.md#async-actions) documentation. ([#62665](https://github.com/WordPress/gutenberg/pull/62665))
+
 ## 6.0.0 (2024-05-31)
 
 ### New Features