docs(accordion): update to addIcons usage

Author: brandyscarney

static/usage/v7/accordion/customization/icons/angular/example_component_ts.md

@@ -1,11 +1,22 @@
 ```ts
 import { Component } from '@angular/core';
 import { IonAccordion, IonAccordionGroup, IonItem, IonLabel } from '@ionic/angular/standalone';
+import { addIcons } from 'ionicons';
+import { caretDownCircle } from 'ionicons/icons';
 
 @Component({
   selector: 'app-example',
   templateUrl: 'example.component.html',
   imports: [IonAccordion, IonAccordionGroup, IonItem, IonLabel],
 })
-export class ExampleComponent {}
+export class ExampleComponent {
+  constructor() {
+    /**
+     * Any icons you want to use in your application
+     * can be registered in app.component.ts and then
+     * referenced by name anywhere in your application.
+     */
+    addIcons({ caretDownCircle });
+  }
+}
 ```

static/usage/v8/accordion/customization/icons/angular/example_component_ts.md

@@ -1,11 +1,22 @@
 ```ts
 import { Component } from '@angular/core';
 import { IonAccordion, IonAccordionGroup, IonItem, IonLabel } from '@ionic/angular/standalone';
+import { addIcons } from 'ionicons';
+import { caretDownCircle } from 'ionicons/icons';
 
 @Component({
   selector: 'app-example',
   templateUrl: 'example.component.html',
   imports: [IonAccordion, IonAccordionGroup, IonItem, IonLabel],
 })
-export class ExampleComponent {}
+export class ExampleComponent {
+  constructor() {
+    /**
+     * Any icons you want to use in your application
+     * can be registered in app.component.ts and then
+     * referenced by name anywhere in your application.
+     */
+    addIcons({ caretDownCircle });
+  }
+}
 ```