fix(): set first option selected in select-popover test page

Author: Tanner Reits

core/src/components/select-modal/test/basic/index.html

@@ -32,7 +32,7 @@
     <script>
       const selectModal = document.querySelector('ion-select-modal');
       selectModal.options = [
-        { value: 'apple', text: 'Apple', disabled: false, checked: false },
+        { value: 'apple', text: 'Apple', disabled: false, checked: true },
         { value: 'banana', text: 'Banana', disabled: false, checked: false },
       ];
     </script>