Replaced aria-hidden with inert

Author: ok7sai

src/cdk-experimental/tabs/tabs.ts

@@ -193,7 +193,7 @@ export class CdkTab {
     'role': 'tabpanel',
     'class': 'cdk-tabpanel',
     '[attr.id]': 'pattern.id()',
-    '[attr.aria-hidden]': 'pattern.hidden()',
+    '[attr.inert]': 'pattern.hidden() ? true : null',
   },
 })
 export class CdkTabpanel {

src/components-examples/cdk-experimental/tabs/cdk-tabs/cdk-tabs-example.css

@@ -71,6 +71,6 @@
   margin: 8px;
 }
 
-.example-tabpanel[aria-hidden='true'] {
+.example-tabpanel[inert] {
   display: none;
 }