refactor: move contentype to header

middlewares/cmsContent.ts

@@ -26,9 +26,9 @@ export const middleware: NextMiddleware = async (request) => {
       `Unable to resolve CMS entry for locale "${lang}": ${pathNameWithoutLang}`
     )
   }
-
   const headers = getDefaultRequestHeaders(request)
   headers.set("x-uid", uid)
+  headers.set("x-contenttype", contentType)
 
   const isCurrent = contentType ? contentType.indexOf("current") >= 0 : false