include contentType on the window.guardian object for the all newsletters page

Author: cemms1

dotcom-rendering/src/server/render.allEditorialNewslettersPage.web.tsx

@@ -78,6 +78,7 @@ export const renderEditorialNewslettersPage = ({
 		abTests: newslettersPage.config.abTests,
 		serverSideABTests: newslettersPage.config.serverSideABTests,
 		brazeApiKey: newslettersPage.config.brazeApiKey,
+		contentType: newslettersPage.config.contentType,
 		googleRecaptchaSiteKey: newslettersPage.config.googleRecaptchaSiteKey,
 		googleRecaptchaSiteKeyVisible:
 			newslettersPage.config.googleRecaptchaSiteKeyVisible,

dotcom-rendering/src/types/newslettersPage.ts

@@ -45,6 +45,7 @@ type FENewslettersConfigType = {
 	// isPreview?: boolean;
 	googleRecaptchaSiteKey?: string;
 	googleRecaptchaSiteKeyVisible?: string;
+	contentType: string;
 };
 
 export interface FENewslettersPageType {