update wording

Author: devalog

fern/products/api-def/ferndef-pages/types.mdx

@@ -282,7 +282,7 @@ interface Person {
 
 ### Validating types
 
-You can add validation constraints to your types (both aliases and references) to ensure data integrity. These validation constraints are included in generated SDKs for documentation purposes, but actual validation is deferred to the server.
+You can add validation constraints to your types (both aliases and references) to ensure data integrity. These validation constraints are not included in generated SDKs – actual validation is deferred to the server.
 
 <CodeBlock title="Fern Definition">
 ```yaml {8-11, 15-17}