Address reviewer feedback: formatting improvements

- Add backticks around class name in API Reference section (ChatOCIGenAI)
- Add backticks around class name in Related links (ChatOCIGenAI)
- Improve consistency with LangChain documentation standards

Per feedback from @mdrxy on PR #2925

Author: fede-kamel

src/oss/python/integrations/chat/oci_generative_ai.mdx

@@ -322,7 +322,7 @@ See the [OCI model catalog](https://docs.oracle.com/en-us/iaas/Content/generativ
 
 ## API Reference
 
-For detailed documentation of all ChatOCIGenAI features and configurations, see the [API reference](https://python.langchain.com/api_reference/oci/chat_models/langchain_oci.chat_models.oci_genai.ChatOCIGenAI.html).
+For detailed documentation of all `ChatOCIGenAI` features and configurations, see the [API reference](https://python.langchain.com/api_reference/oci/chat_models/langchain_oci.chat_models.oci_genai.ChatOCIGenAI.html).
 
 ## Related
 

src/oss/python/integrations/text_embedding/oci_generative_ai.mdx

@@ -149,6 +149,6 @@ For detailed documentation of all OCIGenAIEmbeddings features and configurations
 ## Related
 
 - [OCI Provider Overview](/oss/integrations/providers/oci)
-- [ChatOCIGenAI](/oss/integrations/chat/oci_generative_ai)
+- [`ChatOCIGenAI`](/oss/integrations/chat/oci_generative_ai)
 - [Embeddings Guide](/oss/langchain/embeddings)
 - [RAG Tutorial](/oss/langchain/rag)