Update changelog.

Author: nedtwigg

plugin-gradle/CHANGES.md

@@ -3,6 +3,8 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
 ## [Unreleased]
+### Fixed
+* Fix a regression in BufStep where the same arguments were being provided to every `buf` invocation. ([#1976](https://github.com/diffplug/spotless/issues/1976))
 ### Changes
 * Use palantir-java-format 2.39.0 on Java 21. ([#1948](https://github.com/diffplug/spotless/pull/1948))
 * Bump default `ktlint` version to latest `1.0.1` -> `1.1.1`. ([#1973](https://github.com/diffplug/spotless/pull/1973))