added warning callout to skipResponseValidation

Author: devalog

fern/products/sdks/pages/typescript/configuration.mdx

@@ -45,6 +45,8 @@ Fern Definition).
 
 If `skipResponseValidation` is set to `true`, the client will never throw if the response is misshapen. Instead, the client will log the issue using `console.warn` and return the data (casted to the expected response type).
 
+<Warning>Response validation only occurs when the Serde layer is enabled (`noSerdeLayer: false`). The Serde layer is disabled by default (`noSerdeLayer: true`).</Warning>
+
 </ParamField>
 
 <ParamField path="extraDependencies" type="object" default="{}">