Fix: Update Langchain DeepAgents logo image (#2255)

Co-authored-by: Cursor Agent <[email protected]>

Author: marcklingen

pages/integrations/frameworks/langchain-deepagents.mdx

@@ -2,7 +2,7 @@
 source: ⚠️ Jupyter Notebook
 title: Observability for LangChain DeepAgents with Langfuse
 sidebarTitle: LangChain DeepAgents
-logo: /images/integrations/langchain.svg
+logo: /images/integrations/langchain_icon.png
 description: Learn how to integrate Langfuse with LangChain DeepAgents for enhanced observability and tracing
 category: Integrations
 ---