Fixed multiple products check helper method

no refs

- fixes incorrect condition in helper that determines if Portal has multiple products or single from site

ghost/portal/src/utils/helpers.js

@@ -141,7 +141,7 @@ export function hasMultipleProducts({site = {}}) {
     const {
         products = []
     } = site || {};
-    if (products?.length > 0) {
+    if (products?.length > 1) {
         return true;
     }
     return false;