Update docs to explainb bridging between endpoints and mode

docs/my-website/docs/completion/usage.md

@@ -26,6 +26,7 @@ response = completion(
 
 print(response.usage)
 ```
+> **Note:** LiteLLM supports endpoint bridging—if a model does not natively support a requested endpoint, LiteLLM will automatically route the call to the correct supported endpoint (such as bridging `/chat/completions` to `/responses` or vice versa) based on the model's `mode`set in `model_prices_and_context_window`.
 
 ## Streaming Usage
 

docs/my-website/docs/response_api.md

@@ -3,8 +3,11 @@ import TabItem from '@theme/TabItem';
 
 # /responses [Beta]
 
+
 LiteLLM provides a BETA endpoint in the spec of [OpenAI's `/responses` API](https://platform.openai.com/docs/api-reference/responses)
 
+Requests to /chat/completions may be bridged here automatically when the provider lacks support for that endpoint. The model’s default `mode` determines how bridging works.(see `model_prices_and_context_window`) 
+
 | Feature | Supported | Notes |
 |---------|-----------|--------|
 | Cost Tracking | ✅ | Works with all supported models |