Add langchain embedding, update langchain LLM and version bump -> 0.1.84 (#2510)

docs/changelog/overview.mdx

@@ -6,6 +6,15 @@ mode: "wide"
 <Tabs>
 <Tab title="Python">
 
+<Update label="2025-04-07" description="v0.1.84">
+
+**New Features:**
+- **Langchain Embedder:** Added Langchain embedder integration
+
+**Improvements:**
+- **Langchain LLM:** Updated Langchain LLM integration to directly pass the Langchain object LLM
+</Update>
+
 <Update label="2025-04-07" description="v0.1.83">
 
 **Bug Fixes:**