Update changelog for 0.12.1

Author: Perseudonymous

CHANGELOG.md

@@ -4,6 +4,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+## [0.12.1] - 2024-11-28
+
 + Fix bug in API request when twice-daily forecast was used.
 
 ## [0.12.0] - 2024-11-27