fix(genapi): typo in model name (#5511)

Author: fpagny

macros/ai/chat-comp-vs-responses-api.mdx

@@ -12,6 +12,6 @@ The **Responses** API was released in 2025, and is designed to combine the simpl
 Scaleway's support for the Responses API is currently at beta stage. Support of the full feature set will be incremental: currently statefulness and tools other than `function` calling are not supported. 
 </Message>
 
-Most supported Generative API models can be used with both Chat Completions and Responses API. For the `gtp-oss-120b` model, use of the Responses API is recommended, as it will allow you to access all of its features, especially tool-calling.
+Most supported Generative API models can be used with both Chat Completions and Responses API. For the `gpt-oss-120b` model, use of the Responses API is recommended, as it will allow you to access all of its features, especially tool-calling.
 
 For full details on the differences between these APIs, see the [official OpenAI documentation](https://platform.openai.com/docs/guides/migrate-to-responses).