readme for structured output is updated

Author: moe-mizrak

README.md

@@ -392,7 +392,7 @@ $content = Arr::get($response->choices[0], 'message.content');
 ```
 
 - #### Structured Output
-(Please also refer to [OpenRouter Document Structured Output](https://openrouter.ai/docs/structured-outputs) for models supporting structured output, also more details)
+(Please also refer to [OpenRouter Document Structured Output](https://openrouter.ai/docs/structured-outputs) for models supporting structured output, also for more details)
 
 If you want to receive the response in a structured format, you can specify the `type` property for `response_format` (ResponseFormatData) as `json_object` in the `ChatData` object.