update pipestat changelog for 0.12.0

docs/pipestat/changelog.md

@@ -2,6 +2,13 @@
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html) and [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) format.
 
+## [0.12.0] - 2025-01-16
+### Fixed
+- portable report now has proper file extension in messaging.
+- add exception to pipestat summarize if there are no results to report [#210](https://github.com/pepkit/pipestat/issues/210)
+- fix spaces in html files [#211](https://github.com/pepkit/pipestat/issues/211)
+- add output_dir parameter to psm.table
+
 ## [0.11.0] - 2024-10-02
 ### Fixed
 - for output schema, make samples an array type and nest under items [#204](https://github.com/pepkit/pipestat/issues/204)