update changelog (#2534)

docs/changelog/overview.mdx

@@ -6,6 +6,24 @@ mode: "wide"
 <Tabs>
 <Tab title="Python">
 
+<Update label="2025-04-11" description="v0.1.89">
+
+**New Features:**
+- **Langchain Integration:** Added support for Langchain VectorStores
+- **Examples:** 
+  - Added personal assistant example
+  - Added personal study buddy example
+  - Added YouTube assistant Chrome extension example
+  - Added agno example
+  - Updated OpenAI Responses API examples
+- **Vector Store:** Added capability to store user_id in vector database
+- **Async Memory:** Added async support for OSS
+
+**Improvements:**
+- **Documentation:** Updated formatting and examples
+
+</Update>
+
 <Update label="2025-04-09" description="v0.1.87">
 
 **New Features:**