docs(bil): fix instance name (scaleway#4082)

Author: ldecarvalho-doc

console/billing/additional-content/understanding-savings-plans.mdx

@@ -99,7 +99,7 @@ The **Compute Savings Plan** can be used with the following resources, simultane
 
 The following resources are **not** covered by the Savings Plan discount:
 
-    - Instances H100, RENDER, L40, L4, COPARM1, START1, X64, POP-WIN
+    - Instances H100, RENDER, L40S, L4, COPARM1, START1, X64, POP-WIN
 
 
 <Message type="important">