feat(genapi): update rate limits increase guidelines

Author: fpagny

pages/generative-apis/reference-content/rate-limits.mdx

@@ -31,8 +31,8 @@ If you created a Scaleway account but did not register a valid payment method, s
 We actively monitor usage and will improve rates based on feedback.
 If you need to increase your rate limits:
 - [Verify your identity](/account/how-to/verify-identity/) to automatically increase your rate limit as described below
-- [Contact our support team](https://console.scaleway.com/support/create), providing details on the model used and specific use case, for additional increases.
-Note that for increases of up to x5 or x10, we highly recommend using dedicated deployments with [Managed Inference](https://console.scaleway.com/inference/deployments), which provides exactly the same features and API compatibility.
+- Use [Managed Inference](https://console.scaleway.com/inference/deployments), which provides dedicated capacity and doesn’t enforce rate limits (you remain limited by the total provisioned capacity)
+- Contact your existing Scaleway account manager or our Sales team to discuss volume commitment for specific models that will allow us to increase your quota proportionally.
 
 ## Why do we set rate limits?