Remove tablet screenshot from PWA manifest

- Keep only desktop (wide) and mobile (narrow) screenshots
- Reduces manifest size and focuses on primary form factors

nuxt4/nuxt.config.ts

@@ -56,13 +56,6 @@ export default defineNuxtConfig({
           form_factor: 'wide',
           label: 'Pantalla principal en escritorio'
         },
-        {
-          src: '/screenshots/tablet-1.png',
-          sizes: '768x1024',
-          type: 'image/png',
-          form_factor: 'narrow',
-          label: 'Pantalla principal en tablet'
-        },
         {
           src: '/screenshots/mobile-1.png',
           sizes: '614x853',