Add to CHANGES.md follow up negative int32 fix (#34408)

Author: Abacn

CHANGES.md

@@ -80,6 +80,7 @@
 ## Bugfixes
 
 * Fixed X (Java/Python) ([#X](https://github.com/apache/beam/issues/X)).
+* Fixed read Beam rows from cross-lang transform (for example, ReadFromJdbc) involving negative 32-bit integers incorrectly decoded to large integers ([#34089](https://github.com/apache/beam/issues/34089))
 
 ## Security Fixes
 * Fixed (CVE-YYYY-NNNN)[https://www.cve.org/CVERecord?id=CVE-YYYY-NNNN] (Java/Python/Go) ([#X](https://github.com/apache/beam/issues/X)).