fixing locale param

Author: abhijitb

src/OnboardingSPA/steps/SiteGen/Preview/index.js

@@ -109,7 +109,7 @@ const SiteGenPreview = () => {
 
 		const response = await getHomepages(
 			currentData.sitegen.siteDetails.prompt,
-			currentData.sitegen.locale,
+			currentData.sitegen.siteDetails.locale,
 		);
 
 		if ( response.error ) {