Revert "Update changelog for pluggable-widgets-tools"

This reverts commit 220fb1b.

Author: weirdwater

packages/pluggable-widgets-tools/CHANGELOG.md

@@ -6,8 +6,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
-## [11.12.1] - 2026-08-06
-
 ### Added
 
 -   We fixed an issue with the Jest configuration affecting unit tests for widgets importing enums from the mendix package (e.g. ValueStatus, FormatterType). It would cause tests to fail with the error "This package should not be used in the runtime".