feat(genapi): add maximum concurrent requests

Author: fpagny

pages/organizations-and-projects/additional-content/organization-quotas.mdx

@@ -168,6 +168,7 @@ Managed Inference Deployments are limited to a maximum number of nodes, dependin
 Generative APIs are rate limited based on:
 - Tokens per minute (total input and output tokens)
 - Requests per minute
+- Concurrent requests (total active HTTP session at the same time)
 
 <Message type="important">
   [Contact our support team](https://console.scaleway.com/support/create) if you want to increase your quotas above these limits.
@@ -194,6 +195,9 @@ Generative APIs are rate limited based on:
 | qwen2.5-32b-instruct	  | 300 | 300                                                                |
 | bge-multilingual-gemma2		  | 300 | 300                                                                |
 
+|  Concurrent requests   | [Payment method validated](/billing/how-to/add-payment-method/#how-to-add-a-credit-card) | Payment method and [identity validated](/account/how-to/verify-identity/) |
+|-------------|:----------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------:|
+| All models		  | 25 | 25                                                                |
 
 ## Apple silicon