chore: update changelog

Signed-off-by: Tyler Rockwood <rockwood@redpanda.com>

Author: rockwotj

CHANGELOG.md

@@ -9,6 +9,10 @@ All notable changes to this project will be documented in this file.
 
 - Parameter `root_tag` added to the `format_xml()` Bloblang method. (@mihaitodor)
 
+### Fixed
+
+- Fixed an issue where the `mongodb_cdc` inputs could have spurious errors when collections had no writes for > 30 seconds. (@rockwotj)
+
 ## 4.55.1 - 2025-05-19
 
 ### Added