fix(serverless): using h1 instead of h2 (#6217)

Author: thomas-tacquet

pages/serverless-containers/reference-content/v1-migration-guide.mdx

@@ -7,7 +7,7 @@ dates:
   posted: 2026-02-09
 ---
 
-# Overview of the v1 API evolution
+## Overview of the v1 API evolution
 
 The transition from `v1beta1` to `v1` for Scaleway Serverless Containers introduces significant improvements in security, resource management, and flexibility.
 Users of the API, CLI, and Terraform must note several key updates to field names and behaviors.