Report prism changes. (#31433)

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

CHANGES.md

@@ -74,6 +74,10 @@
 * DataFrame API now supports pandas 2.1.x and adds 12 more string functions for Series.([#31185](https://github.com/apache/beam/pull/31185)).
 * Added BigQuery handler for enrichment transform (Python) ([#31295](https://github.com/apache/beam/pull/31295))
 * Disable soft delete policy when creating the default bucket for a project (Java) ([#31324](https://github.com/apache/beam/pull/31324)).
+* Go SDK Prism Runner
+  * Pre-built Prism binaries are now part of the release and are available via the Github release page. ([#29697](https://github.com/apache/beam/issues/29697)).
+  * ProcessingTime is now handled synthetically with TestStream pipelines and Non-TestStream pipelines, for fast test pipeline execution by default. ([#30083](https://github.com/apache/beam/issues/30083)).
+    * Prism does NOT yet support "real time" execution for this release.
 
 ## Breaking Changes