docs[patch]: Missing how to index section for multi modal (#5575)

* docs[patch]: Missing how to index section for multi modal

* format

docs/core_docs/docs/how_to/index.mdx

@@ -190,6 +190,11 @@ All of LangChain components can easily be extended to support your own versions.
 - [How to: stream agentic data to the client](/docs/how_to/stream_agent_client)
 - [How to: stream structured output to the client](/docs/how_to/stream_tool_client)
 
+### Multimodal
+
+- [How to: pass multimodal data directly to models](/docs/how_to/multimodal_inputs/)
+- [How to: use multimodal prompts](/docs/how_to/multimodal_prompts/)
+
 ## Use cases
 
 These guides cover use-case specific details.