fix: demo tab signal

Author: danielmoncada

src/app/app.component.html

@@ -64,5 +64,5 @@ <h4>Inline Picker with Milliseconds:</h4>
     </owl-date-time-inline>
   </div>
   }
-  }
+}
 </main>

src/app/app.component.ts

@@ -20,7 +20,7 @@ const ONE_DAY = 24 * 60 * 60 * 1000;
   ]
 })
 export class AppComponent {
-  protected readonly currentTab = signal<'date-range' | 'date-range-dialog' | 'date-time-inline'>('date-range');
+  protected readonly currentTab = signal<'date-range' | 'date-range-dialog' | 'date-time-inline' | 'milliseconds-demo'>('date-range');
 
   protected selectedDates: [Date, Date] = [
     new Date(Date.now() - ONE_DAY),