docs: change comments for pwa-elements defineCustomElements (#3191)

Author: jcesarmobile

docs/angular/your-first-app.md

@@ -106,7 +106,7 @@ Next, import `@ionic/pwa-elements` by editing `src/main.ts`.
 ```tsx
 import { defineCustomElements } from '@ionic/pwa-elements/loader';
 
-// Call the element loader after the platform has been bootstrapped
+// Call the element loader before the bootstrapModule/bootstrapApplication call
 defineCustomElements(window);
 ```
 

docs/react/your-first-app.md

@@ -104,7 +104,7 @@ Next, import `@ionic/pwa-elements` by editing `src/main.tsx`.
 ```tsx
 import { defineCustomElements } from '@ionic/pwa-elements/loader';
 
-// Call the element loader after the platform has been bootstrapped
+// Call the element loader before the render call
 defineCustomElements(window);
 ```
 

docs/vue/your-first-app.md

@@ -104,8 +104,6 @@ Next, import `@ionic/pwa-elements` by editing `src/main.ts`.
 ```tsx
 // Above the createApp() line
 import { defineCustomElements } from '@ionic/pwa-elements/loader';
-
-// Call the element loader after the platform has been bootstrapped
 defineCustomElements(window);
 ```