Update request.js X-User-Agent

Author: nadeem-cs

src/core/lib/request.js

@@ -33,7 +33,7 @@ export default function Request(stack, fetchOptions) {
 
         // setting headers
         requestParams.headers['Content-Type'] = 'application/json; charset=UTF-8';
-        requestParams.headers['X-User-Agent'] = 'contentstack-{{PLATFORM}}/' + version;
+        requestParams.headers['X-User-Agent'] = 'contentstack-delivery-{{PLATFORM}}/' + version;
 
         if (requestParams.body && typeof requestParams.body === 'object') {
             delete requestParams.body._method;
@@ -143,4 +143,4 @@ function fetchRetry(stack, queryParams, fetchOptions, resolve, reject, retryDela
             if (fetchOptions.debug)  fetchOptions.logHandler('error', error);
             reject(error)
         });
-}
+}