Prep for release of 0.2.1 (#212)

Contains `INTPYTHON-748` addressing
langchain-ai/langgraph#6040

Author: caseyclements

libs/langgraph-checkpoint-mongodb/CHANGELOG.md

@@ -2,7 +2,11 @@
 
 ---
 
-## Changes in version 0.2.0 (2025.08.20)
+## Changes in version 0.2.1 (2025/09/25)
+
+- Fixes bug when graph interrupted leading to DuplicateKeyError when TTL is set.
+
+## Changes in version 0.2.0 (2025/08/20)
 
 - Implements async methods of MongoDBSaver.
 - Deprecates ASyncMongoDBSaver, to be removed in 0.3.0.

libs/langgraph-checkpoint-mongodb/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-mongodb"
-version = "0.2.0"
+version = "0.2.1"
 description = "Library with a MongoDB implementation of LangGraph checkpoint saver."
 readme = "README.md"
 requires-python = ">=3.9"