docs(release): Prepare for v0.12.1 release

Author: stronk7

CHANGELOG.md

@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and commits should be formatted using [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/).
 
-## [Unreleased]
+## [0.12.1] - 2025-12-01
 
 ### Changed
 
@@ -17,7 +17,9 @@ and commits should be formatted using [Conventional Commits](https://www.convent
 
 ### Fixed
 
-- Embeddings: Solved a problem caused by recent Langchain updates
+- Embeddings: Solved a problem caused by recent Langchain updates by @stronk7 ([678af33](https://github.com/moodlehq/wiki-rag/commit/678af33d48e2963ece3da4fa421ab3580df7fd32))
+
+**Full Changelog**: https://github.com/moodlehq/wiki-rag/compare/v0.12.0...v0.12.1
 
 ## [0.12.0] - 2025-11-03
 
@@ -421,7 +423,7 @@ trivial and everything continues working exactly the same.
 
 
 
-[unreleased]: https://github.com/moodlehq/wiki-rag/compare/v0.12.0..HEAD
+[0.12.1]: https://github.com/moodlehq/wiki-rag/compare/v0.12.0..v0.12.1
 [0.12.0]: https://github.com/moodlehq/wiki-rag/compare/v0.11.2..v0.12.0
 [0.11.2]: https://github.com/moodlehq/wiki-rag/compare/v0.11.1..v0.11.2
 [0.11.1]: https://github.com/moodlehq/wiki-rag/compare/v0.11.0..v0.11.1