fix tests

Author: adolgachev

src/aria/accordion/accordion.spec.ts

@@ -387,13 +387,13 @@ describe('AccordionGroup', () => {
         <div class="item-container">
           <button
             ngAccordionTrigger
-            [panelId]="item.panelId"
+            [panel]="panel"
             [disabled]="item.disabled"
             [(expanded)]="item.expanded"
           >{{ item.header }}</button>
           <div
             ngAccordionPanel
-            [panelId]="item.panelId"
+            #panel="ngAccordionPanel"
           >
             <ng-template ngAccordionContent>
               {{ item.content }}